Prasanna

Check the below NCERT MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Human Eye and Colourful World Class 10 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-10-science-chapter-11/

You can refer to NCERT Solutions for Class 10 Science Chapter 11 Human Eye and Colourful World to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Human Eye and Colourful World Class 10 MCQs Questions with Answers

Human Eye And Colourful World Class 10 MCQ Question 1.
A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using lens of power
(a) +0.5 D
(b) -0.5 D
(c) +0.2 D
(d) -0.2 D

Answer

Answer: (b) -0.5 D

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Human Eye And Colourful World MCQ Question 2.
A student sitting on the last bench can read the letters written on the blackboard but is not able to read / the letters written in his textbook. Which of the following statements is correct?
(a) The near point of his eyes has receded away.
(b) The near point of his eyes has come closer to him.
(c) The far point of his eyes has come closer to him.
(d) The far point of his eyes has receded away.

Answer

Answer: (a) The near point of his eyes has receded away.

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Human Eye Class 10 MCQ Question 3.
A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in the Figures given below. In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?

(a) (i)
(b) (ii)
(c) (iii)
(d) (iv)

Answer

Answer: (b) (ii)

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Human Eye MCQ Class 10 Question 4.
At noon the sun appears white as
(a) light is least scattered.
(b) all the colours of the white light are scattered away.
(c) blue colour is scattered the most.
(d) red colour is scattered the most.

Answer

Answer: (a) light is least scattered.

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Human Eye And The Colourful World MCQ Question 5.
Which of the following phenomena of light are involved in the formation of a rainbow?
(a) Reflection, refraction and dispersion
(b) Refraction, dispersion and total internal reflection
(c) Refraction, dispersion and internal reflection
(d) Dispersion, scattering and total internal reflection

Answer

Answer: (c) Refraction, dispersion and internal reflection

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Colourful World Class 10 MCQ Question 6.
Twinkling of stars is due to atmospheric
(a) dispersion of light by water droplets
(b) refraction of light by different layers of varying refractive indices
(c) scattering of light by dust particles
(d) internal reflection of light by clouds

Answer

Answer: (b) refraction of light by different layers of varying refractive indices

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Class 10 Human Eye And The Colourful World MCQ Question 7.
The clear sky appears blue because
(а) blue light gets absorbed in the atmosphere.
(b) ultraviolet radiations are absorbed in the atmosphere.
(c) violet and blue lights get scattered more than lights of all other colours by the atmosphere.
(d) light of all other colours is scattered more than the violet and blue colour lights by the atmosphere.

Answer

Answer: (c) violet and blue lights get scattered more than lights of all other colours by the atmosphere.

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Class 10 Human Eye And The Colourful World MCQ Question 7.
Which of the following statements is correct regarding the propagation of light of different colours of white light in air?
(a) Red light moves fastest.
(b) Blue light moves faster than green light.
(c) All the colours of the white light move with the same speed.
(d) Yellow light moves with the mean speed as that of the red and the violet light.

Answer

Answer: (c) All the colours of the white light move with the same speed.

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Human Eye And Colourful World Class 10 MCQ With Answers Question 9.
The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light
(a) is scattered the most by smoke or fog.
(b) is scattered the least by smoke or fog.
(c) is absorbed the most by smoke or fog.
(d) moves fastest in air.

Answer

Answer: (b) is scattered the least by smoke or fog.

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MCQ Of Human Eye Class 10 Question 10.
Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
(a) Dispersion of light
(b) Scattering of light
(c) Total internal reflection of light
(d) Reflection of light from the earth

Answer

Answer: (b) Scattering of light

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MCQ On Human Eye Class 10 Question 11.
The bluish colour of water in deep sea is due to
(a) the presence of algae and other plants found in water
(b) reflection of sky in water
(c) scattering of light
(d) absorption of light by the sea

Answer

Answer: (c) scattering of light

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Ch 11 Science Class 10 MCQ Question 12.
When light rays enter the eye, most of the refraction occurs at the
(a) crystalline lens
(b) outer surface of the cornea
(c) iris
(d) pupil

Answer

Answer: (b) outer surface of the cornea

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The Colourful World Class 10 MCQ Question 13.
The focal length of the eye lens increases when eye muscles
(a) are relaxed and lens becomes thinner
(b) contract and lens becomes thicker
(c) are relaxed and lens becomes thicker
(d) contract and lens becomes thinner

Answer

Answer: (a) are relaxed and lens becomes thinner

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The Colourful World Class 10 MCQ Question 13.
Which of the following statement is correct?
(a) A person with myopia can see distant objects clearly.
(b) A person with hypermetropia can see nearby objects clearly.
(c) A person with myopia can see nearby objects clearly.
(d) A person with hypermetropia cannot see distant objects clearly.

Answer

Answer: (c) A person with myopia can see nearby objects clearly.

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Human Eye And The Colourful World Class 10 MCQ Question 15.
A student traces the path of a ray through a glass prism for four different values of angle of incidence. On analysing the diagrams he is likely to conclude that the emergent ray
(a) is always parallel to the incident ray.
(b) is always perpendicular to the incident ray.
(c) is always parallel to the refracted ray.
(d) always bends at an angle to the direction of incident ray.

Answer

Answer: (d) always bends at an angle to the direction of incident ray.

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MCQ Of Colourful World Class 10 Question 16.
A student is observing the diagram showing the path of a ray of light passing through a glass prism. He would find that for all angles of incidence the ray of light bends:
(а) towards the normal while entering into the prism and away from the normal while emerging out of the prism
(b) away from the normal while entering into the prism and towards the normal while emerging out of the prism.
(c) away from the normal while entering as well as while emerging out of the prism.
(d) towards the normal while entering as well as while emerging out of the prism.

Answer

Answer: (а) towards the normal while entering into the prism and away from the normal while emerging out of the prism

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MCQs On Human Eye And Colourful World Question 17.
In the following diagram, the path of a ray of light passing through a glass prism is shown:

In this diagram the angle of incidence, the angle of emergence and the angle of deviation respectively are (select the correct option):
(a) X, R and T
(b) Y, Q and T
(c) X, Q and P
(d) Y, Q and P

Answer

Answer: (d) Y, Q and P

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MCQ Of Human Eye And Colourful World Question 18.
After tracing the path of a ray of light through a glass prism a student marked the angle of incidence (∠i), angle of refraction (∠r), angle of emergence (∠e) and the angle of deviation (∠D) as shown in the diagram. The correctly marked angles are:

(a) ∠i and ∠r
(b) ∠i and ∠e
(c) ∠i, ∠e and ∠D
(d) ∠i, ∠r and ∠e

Answer

Answer: (b) ∠i and ∠e

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Class 10 Physics Human Eye And The Colourful World MCQ Question 19.
The splitting of white light into its component colours is called
(a) refraction
(b) reflation
(c) dispersion
(d) tyndall effect

Answer

Answer: (c) dispersion

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MCQ Questions For Class 10 Human Eye And Colourful World Question 20.
Reason behind advance sunrise and delayed sunset
(a) atmospheric refraction
(b) total internal reflection
(c) dispersion
(d) reflection

Answer

Answer: (a) atmospheric refraction

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Class 10 Science Human Eye And Colourful World MCQ Question 21.
Type of lens used in correction of myopia
(a) convex lens
(b) concave lens
(c) reflecting lens
(d) bifocal lens

Answer

Answer: (b) concave lens

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Question 22.
Type of lens used in correction of hypermetropia
(a) concave lens
(b) reflecting lens
(c) bifocal lens
(d) convex lens

Answer

Answer: (d) convex lens

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Question 23.
Myopia may arise due to
(a) excessive curvature of the eye lens
(b) elongation of the eyeball
(c) both (a) and (b)
(d) none of these

Answer

Answer: (c) both (a) and (b)

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Question 24.
In an experiment to trace the path of a ray of light through a glass prism for different values of angle of incidence a student would find that the emergent ray:
(a) is parallel to the incident ray
(b) is perpendicular to the incident ray
(c) is parallel to the refracted ray
(d) bends at an angle to the direction of incident ray

Answer

Answer: (d) bends at an angle to the direction of incident ray

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Question 25.
While performing the experiment to trace the path of a ray of light passing through a glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below.

The correct path of the rays has been shown by:
(a) I
(b) II
(c) III
(d) IV

Answer

Answer: (c) III

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Question 26.
A dark muscular membrane which controls size of pupil
(a) eye
(b) iris
(c) cornea
(d) retina

Answer

Answer: (b) iris

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Question 27.
Least distance of distinct vision for normal eye is
(a) 25 cm
(b) 50 cm
(c) 75 cm
(d) infinity

Answer

Answer: (a) 25 cm

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Question 28.
Farthest point of a normal eye is
(a) 25 cm
(b) 50 cm
(c) 75 cm
(d) infinity

Answer

Answer: (d) infinity

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Question 29.
Crystalline lens of people at old age becomes milky and cloudy. This condition is called
(a) myopia
(b) lever
(c) cataract
(d) presbyopia

Answer

Answer: (c) cataract

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Question 30.
The splitting of light into its component colours is called
(a) Spectrum
(b) Dispersion
(c) Tyndall effect
(d) Refraction

Answer

Answer: (b) Dispersion

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Question 31.
Bifocal lens is used in
(a) myopia
(b) lever
(c) Cataract
(d) Presbyopia

Answer

Answer: (d) Presbyopia

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Question 32.
Stars appears to be twinkling because of
(a) atmospheric refraction
(b) reflection
(c) Tyndall effect
(d) spectrum

Answer

Answer: (a) atmospheric refraction

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Fill in the blanks

1. ………….. regulates and controls the amount of light entering the eye.

Answer

Answer: Pupil

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2. The ability of the eye lens to adjust its focal length is called …………..

Answer

Answer: Accomodation

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3. A person with ………….. can see nearby objects clearly but cannot see distant objects clearly.

Answer

Answer: Myopia

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4. The splitting of light into its component colours is called …………..

Answer

Answer: Dispersion

---

5. The phenomenon of scattering of light by colloidal particles gives rise to …………..

Answer

Answer: Tyndall effect

---

Match the following columns

Column I	Column II
(a) Rainbow formation	(i) A person cannot see nearby objects clearly
(b) Twinkling of stars	(ii) Regulates and controls amount of light entering the eye
(c) Blue colour of sky	(iii) Scattering of light
(d) Myopia	(iv) Dispersion
(e) Hypermetropia	(v) Infinity
(f) Least distance of distinct vision	(vi) Membrane which controls the size of pupil
(g) Far point of eye	(vii) Atmospheric refraction
(h) Iris	(viii) Twenty five centimeters
(i) Pupil	(ix) A person cannot see distant objects distinctly

Answer

Answer:

Column I	Column II
(a) Rainbow formation	(iv) Dispersion
(b) Twinkling of stars	(vii) Atmospheric refraction
(c) Blue colour of sky	(iii) Scattering of light
(d) Myopia	(ix) A person cannot see distant objects distinctly
(e) Hypermetropia	(i) A person cannot see nearby objects clearly
(f) Least distance of distinct vision	(viii) Twenty five centimeters
(g) Far point of eye	(v) Infinity
(h) Iris	(vi) Membrane which controls the size of pupil
(i) Pupil	(ii) Regulates and controls amount of light entering the eye

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Complete the crossword below:

Across
3. Lens used for correction of myopia
5. The phenomenon of scattering of light by colloidal particles .
7. The band of coloured components of a light beam
8. Part of eye which regulates and controls the amount of light entering the eye
9. Lens used in correction of presbyopia
10. Lens used in correction of hypermetropia
11. Colour used for danger signal
12. Farthest point for a normal eye
Down
1. Eye defect in which a person cannot see distant objects distinctly
2. Eye defect in which a person cannot be nearby objects clearly
4. Splitting of light into its component colours
5. Least distance of distinct vision (in cm)
6. The eye defect which is caused by weakening of ciliary muscles

Answer

Answer:
Across:
3. Concave lens
5. Tyndall effect
7. Spectrum
8. Pupil
9. Bifocal lens
10. Convex lens
11. Red
12. Infinity

Down:
1. Myopia
2. Hypermetropia
4. Dispersion
5. Twenty five
6. Presbyopia

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We hope the given NCERT MCQ Questions for Class 10 Science Chapter 11 Human Eye and Colourful World with Answers Pdf free download will help you. If you have any queries regarding Human Eye and Colourful World CBSE Class 10 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 10 Science Chapter 10 Light Reflection and Refraction with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Light Reflection and Refraction Class 10 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-10-science-chapter-10/

You can refer to NCERT Solutions for Class 10 Science Chapter 10 Light Reflection and Refraction to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Light Reflection and Refraction Class 10 MCQs Questions with Answers

Light Reflection And Refraction Class 10 MCQ Question 1.
Which of the following can make a parallel beam of light when light from a point source is incident on it?
(a) Concave mirror as well as convex lens
(b) Convex mirror as well as concave lens
(c) Two plane mirrors placed at 90° to each other
(d) Concave mirror as well as concave lens

Answer

Answer: (a) Concave mirror as well as convex lens

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Light Class 10 MCQ Question 2.
A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is
(a) -30 cm
(b) -20 cm
(c) -40cm
(d) -60 cm

Answer

Answer: (b) -20 cm

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Class 10 Light MCQ Question 3.
Under which of the following conditions a concave mirror can form an image larger than the actual object?
(a) When the object is kept at a distance equal to its radius of curvature
(b) When object is kept at a distance less than its focal length
(c) When object is placed between the focus and centre of curvature
(d) When object is kept at a distance greater than its radius of curvature

Answer

Answer: (c) When object is placed between the focus and centre of curvature

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MCQ Of Light Class 10 Question 4.
The diagrams showing the correct path of the ray after passing through the

(a) II and III only
(b) I and II only
(c) I, II and III
(d) I, II and IV

Answer

Answer: (c) I, II and III

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Class 10 Light Reflection And Refraction MCQ Question 5.
A light ray enters from medium A to medium B as shown in figure. The refractive index of medium B relative to A will be

(a) greater than unity
(b) less than unity
(c) equal to unity
(d) zero

Answer

Answer: (a) greater than unity

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Class 10 Science Chapter 10 MCQ Question 6.
Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the figure. Which of the following could be inside the box?

(a) A rectangular glass slab
(b) A convex lens
(c) A concave lens
(d) A prism

Answer

Answer: (a) A rectangular glass slab

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MCQ On Light Class 10 Question 7.
A beam of light is incident through the holes on side A and emerges out of the holes on the other face of the box as show in the figure. Which of the following could be inside the box?

(a) Concave lens
(b) Rectangular glass slab
(c) Prism
(d) Convex lens

Answer

Answer: (d) Convex lens

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Light Reflection And Refraction MCQ Question 8.
Which of the following statements is true?
(a) A convex lens has 4 dioptre power having a focal length 0.25 m
(b) A convex lens has -4 dioptre power having a focal length 0.25 m
(c) A concave lens has 4 dioptre power having a focal length 0.25 m
(d) A concave lens has -4 dioptre power having a focal length 0.25 m.

Answer

Answer: (a) A convex lens has 4 dioptre power having a focal length 0.25 m

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Reflection Of Light Class 10 MCQ Question 9.
Magnification produced by a rear view mirror fitted in vehicles
(a) is less than one
(b) is more than one
(c) is equal to one
(d) can be more than or less than one depending upon the position of the object in front of it.

Answer

Answer: (a) is less than one

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Light Chapter Class 10 MCQ Question 10.
Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?
(a) 15 cm in front of the mirror
(b) 30 cm in front of the mirror
(c) between 15 cm and and 30 cm in front of the mirror
(d) more than 30 cm in front of the mirror

Answer

Answer: (b) 30 cm in front of the mirror

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Ch 10 Science Class 10 MCQ Question 11.
A full length image of a distant tall building can definitely be seen by using
(a) a concave mirror
(b) a convex mirror
(c) a plane mirror
(d) both concave as well as plane mirror

Answer

Answer: (b) a convex mirror

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MCQ Of Light Reflection And Refraction Class 10 Question 12.
In torches, search lights and headlights of vehicles the bulb is placed
(a) between the pole and the focus of the reflector
(b) very near to the focus of the reflector
(c) between the focus and centre of curvature of the reflector
(d) at the centre of curvature of the reflector

Answer

Answer: (b) very near to the focus of the reflector

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Class 10 Science Ch 10 MCQ Question 13.
The laws of reflection hold good for
(a) plane mirror only
(b) concave mirror only
(c) convex mirror only
(d) all mirrors irrespective of their shape

Answer

Answer: (d) all mirrors irrespective of their shape

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MCQ Questions On Light Class 10 Question 14.
The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in figure. Which one of them is correct?

(a) A
(b) B
(c) C
(d) D

Answer

Answer: (b) B

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Light And Reflection Class 10 MCQ Question 15.
You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?
(a) Kerosene
(b) Water
(c) Mustard oil
(d) Glycerine

Answer

Answer: (d) Glycerine

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Light Class 10 MCQ With Answers Question 16.
Which of the following ray diagrams is correct for the ray of light incident on a concave mirror as shown in figure?

(a) Fig. A
(b) Fig. B
(c) Fig. C
(d) Fig. D

Answer

Answer: (d) Fig. D

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MCQ Questions For Class 10 Science Chapter 10 Question 17.
Which of the following ray diagrams is correct for the ray of light incident on a lens shown in figure?

(a) Fig. A
(b) Fig. B
(c) Fig. C
(d) Fig. D

Answer

Answer: (a) Fig. A

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Light Reflection And Refraction Class 10 MCQ With Answers Question 18.
A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.
(a) Plane, convex and concave
(b) Convex, concave and plane
(c) Concave, plane and convex
(d) Convex, plane and concave

Answer

Answer: (c) Concave, plane and convex

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Chapter 10 Science Class 10 MCQ Question 19.
In which of the following, the image of an object placed at infinity will be highly diminished and point sized?
(a) Concave mirror only
(b) Convex mirror only
(c) Convex lens only
(d) Concave mirror, convex mirror, concave lens and convex lens

Answer

Answer: (d) Concave mirror, convex mirror, concave lens and convex lens

---

Question 20.
Light travel fastest in
(a) Water
(b) Air
(c) Glass
(d) Diamond

Answer

Answer: (b) Air

---

Question 21.
A student used a device (X) to obtain/focus the image of a well illuminated distant building on a screen (S) as shown alongside in the diagram. Select the correct statement about the device (X).

(a) This device is a concave lens of focal length 8 cm.
(b) This device is a convex mirror of focal length 8 cm.
(c) This device is a convex lens of focal length 4 cm.
(d) This device is a convex lens of focal length 8 cm.

Answer

Answer: (d) This device is a convex lens of focal length 8 cm.

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Question 22.
A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?

(a) MW
(b) MS
(c) SW
(d) MW- WS

Answer

Answer: (b) MS

---

Question 23.
The mirror having reflection surface curved outward
(a) plane mirror
(b) concave mirror
(c) convex mirror
(d) cylindrical mirror

Answer

Answer: (c) convex mirror

---

Question 24.
The mirror having reflecting surface curved inwards
(a) plane mirror
(b) convex mirror
(c) cylindrical mirror
(d) concave mirror

Answer

Answer: (d) concave mirror

---

Question 25.
The mirror used as rear-view mirror in vehicles
(a) convex mirror
(b) plane mirror
(c) cylindrical mirror
(d) concave mirror

Answer

Answer: (a) convex mirror

---

Question 26.
The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is called
(a) reflection
(b) refraction
(c) dispersion
(d) scattering

Answer

Answer: (b) refraction

---

Question 27.
Convex lens is also known as
(a) converging lens
(b) diverging lens
(c) radial lens
(d) axial lens

Answer

Answer: (a) converging lens

---

Question 28.
The image which is formed behind the mirror
(a) real image
(b) virtual image
(c) blue image
(d) partial image

Answer

Answer: (b) virtual image

---

Fill in the blanks

1. When light falls on a surface and bounces back to the medium, the phenomena is called ……………..

Answer

Answer: reflection

---

2. According to laws of reflection, the angle of incidence is equal to angle of ……………..

Answer

Answer: reflection

---

3. When rays of light after reflection meet a point ………….. image is formed.

Answer

Answer: real

---

4. The dentists use ………….. mirror to see large images of teeth of patients.

Answer

Answer: concave

---

5. ……………. is ratio of height of image to height of object.

Answer

Answer: Magnification

---

6. Power of convex lens is positive and concave lens is ………………

Answer

Answer: negative

---

Match the following columns

Column I	Column II
(a) Mirror having magnification always equal to one (m = 1)	(i) concave mirror
(b) Mirror used to concentrate sunlight in reflecting solar cooker	(ii) refraction
(c) Image can be obtained on screen	(iii) plane mirror
(d) Bottom of a tank containing water appears to be raised due to	(iv) convex lens
(e) The lens having power – 2D	(v) real image
(f) The lens which is thicker at middle as compared to edges	(vi) concave lens
(g) Mirror used as rear-view mirror in vehicles	(vii) convex mirror

Answer

Answer:

Column I	Column II
(a) Mirror having magnification always equal to one (m = 1)	(iii) plane mirror
(b) Mirror used to concentrate sunlight in reflecting solar cooker	(i) concave mirror
(c) Image can be obtained on screen	(v) real image
(d) Bottom of a tank containing water appears to be raised due to	(ii) refraction
(e) The lens having power – 2D	(vi) concave lens
(f) The lens which is thicker at middle as compared to edges	(iv) convex lens
(g) Mirror used as rear-view mirror in vehicles	(vii) convex mirror

---

Complete the crossword below:

Across:
4. The deviation of light ray from its path when it travels from one medium to another
5. Magnification of plane mirror
8. Convex lens is also known as
Down:
1. Concave lens is also known as
2. Mirror used as rear view mirror
3. Mirror used by dentist
6. A point on principal axis of lens where all rays of light parallel to the principal axis meets or appear to meet.
7. The image which can be obtained on screen

Answer

Answer:
Across:
4. Refraction
5. One
8. Converging lens

Down:
1. Diverging lens
2. Convex
3. Concave
6. Focus
7. Real image

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We hope the given NCERT MCQ Questions for Class 10 Science Chapter 10 Light Reflection and Refraction with Answers Pdf free download will help you. If you have any queries regarding Light Reflection and Refraction CBSE Class 10 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 10 Science Chapter 9 Heredity and Evolution with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Heredity and Evolution Class 10 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-10-science-chapter-9/

You can refer to NCERT Solutions for Class 10 Science Chapter 9 Heredity and Evolution to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Heredity and Evolution Class 10 MCQs Questions with Answers

Heredity And Evolution Class 10 MCQ Question 1.
Human teeth and elephant’s tusk are
(a) Analogous organs
(b) Vestigeal organs
(c) Homologous organs
(d) Rudimentary organs

Answer

Answer: (c) Homologous organs

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Heredity Class 10 MCQ Question 2.
Independent inheritance of two separate traits, shape and colour of seeds in Mendel’s cross on pea plants resulted in a observable ratio of:
(a) 3 : 1
(b) 9 : 3 : 3 : 1
(c) 1 : 1
(d) 9 : 4 : 2 : 1

Answer

Answer: (b) 9 : 3 : 3 : 1

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Heredity And Evolution MCQ Question 3.
Which of these is not a vestigial organ in human beings?
(a) Appendix
(b) Wisdom tooth
(c) Nictitating membrane
(d) Gall bladder

Answer

Answer: (d) Gall bladder

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Class 10 Heredity And Evolution MCQ Question 4.
Evolution of wild cabbage is an example of:
(a) Artificial selection
(b) Natural selection
(c) Mutation
(d) Genetic drift

Answer

Answer: (a) Artificial selection

---

MCQ On Heredity And Evolution Question 5.
The modern day Human species has evolved from its earliest ancestors who lived in:
(a) Asia
(b) Australia
(c) Africa
(d) China

Answer

Answer: (c) Africa

---

Heredity And Evolution MCQ Questions Question 6.
Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be
(a) double fertilisation
(b) self pollination
(c) cross fertilisation
(d) no fertilisation

Answer

Answer: (b) self pollination

---

MCQ Questions On Heredity And Evolution Class 10 Question 7.
Which of the following statement is incorrect?
(a) For every hormone there is a gene.
(b) For every protein there is a gene.
(c) For production of every enzyme there is a gene.
(d) For every molecule of fat there is a gene

Answer

Answer: (d) For every molecule of fat there is a gene

---

Heredity MCQ Class 10 Question 8.
If a round, green seeded pea plant (RR yy) is crossed with wrinkled, yellow seeded pea plant (rr YY), the seeds produced in F1 generation are
(a) round and yellow
(b) round and green
(c) wrinkled and green
(d) wrinkled and yellow

Answer

Answer: (a) round and yellow

---

MCQ Questions For Class 10 Science Chapter 9 Question 9.
In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are
(i) large chromosome
(ii) small chromosome
(iii) Y-chromosome
(iv) X-chromosome
(a) (i) and (ii)
(b) (iii) only
(c) (iii) and (iv)
(d) (ii) and (iv)

Answer

Answer: (c) (iii) and (iv)

---

MCQs On Heredity And Evolution Class 10 Question 10.
A zygote which has an X-chromosome inherited from the father will develop into a
(a) boy
(b) girl
(c) X- chromosome does not determine the sex of a child
(d) either boy or girl

Answer

Answer: (b) girl

---

Class 10 Science Chapter 9 MCQ Question 11.
New species may be formed if
(i) DNA undergoes significant changes in germ cells
(ii) chromosome number changes in the gamete
(iii) there is no change in the genetic material
(iv) mating does not take place
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii), (iii) and (iv)
(d) (i), (ii) and (iii)

Answer

Answer: (a) (i) and (ii)

---

MCQ Of Heredity And Evolution Question 12.
Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F₁ progeny that have round, yellow (RrYy) seeds. When F₁ plants are selfed, the F₂ progeny will have new combination of characters. Choose the new combination from the following:
(i) Round, yellow
(ii) Round, green
(iii) Wrinkled, yellow
(iv) Wrinkled, green
(a) (i) and (ii)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (i) and (iii)

Answer

Answer: (b) (i) and (iv)

---

MCQ On Heredity And Evolution Class 10 Question 13.
A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the correct homologous structures?
(a) Carrot and potato
(b) Carrot and tomato
(c) Radish and carrot
(d) Radish and potato

Answer

Answer: (c) Radish and carrot

---

Heredity And Evolution Class 10 MCQ With Answers Question 14.
If the fossil of an organism is found in the deeper layers of Earth, then we can predict that
(a) the extinction of organism has occurred recently
(b) the extinction of organism has occurred thousands of years ago
(c) the fossil position in the layers of Earth is not related to its time of extinction
(d) time of extinction cannot be determined

Answer

Answer: (b) the extinction of organism has occurred thousands of years ago

---

Heredity And Evolution Class 10 MCQ Learn Cbse Question 15.
A trait in an organism is influenced by
(a) paternal DNA only
(b) maternal DNA only
(c) both maternal and paternal DNA
(d) neither by paternal nor by maternal DNA

Answer

Answer: (c) both maternal and paternal DNA

---

Question 16.
Select the group which shares maximum number of common characters.
(a) two individuals of a species
(b) two species of a genus
(c) two genera of a family
(d) two genera of two families

Answer

Answer: (a) two individuals of a species

---

Question 17.
According to the evolutionary theory, formation of a new species is generally due to
(а) sudden creation by nature
(b) accumulation of variations over several generations
(c) clones formed during asexual reproduction
(d) movement of individuals from one habitat to another

Answer

Answer: (b) accumulation of variations over several generations

---

Question 18.
Select the statements that describe characteristics of genes
(i) genes are specific sequence of bases in a DNA molecule
(ii) a gene does not code for proteins
(iii) in individuals of a given species, a specific gene is located on a particular chromosome
(iv) each chromosome has only one gene
(a) (i) and (ii)
(b) (i) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)

Answer

Answer: (b) (i) and (iii)

---

Question 19.
In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in F₂ is
(a) 1 : 3
(b) 3 : 1
(c) 1 : 1
(d) 2 : 1

Answer

Answer: (c) 1 : 1

---

Question 20.
Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that
(a) reptiles have evolved from birds
(b) there is no evolutionary connection between reptiles and birds
(c) feathers are homologous structures in both the organisms
(d) birds have evolved from reptiles

Answer

Answer: (d) birds have evolved from reptiles

---

Fill in the blanks

1. The formation of new species is called …………..

Answer

Answer: Speciation

---

2. The earliest members of human species, Homo sapiens can be traced from …………..

Answer

Answer: Africa

---

3. Human beings and chimpanzees had a ………….. ancestor a long time ago.

Answer

Answer: common

---

4. Artificial selection of wild cabbage for arrested flower development and for sterile flowers has generated ………….. and ………….. respectively.

Answer

Answer: Broccoli, cauliflower

---

5. Different structure but same function is a characteristic of ………….. organs.

Answer

Answer: analogies

---

6. The more characteristics two species will have in common, the more ………….. they are related.

Answer

Answer: closely

---

7. The notion of ………….. provides diversity without any adaptations.

Answer

Answer: genetic drift

---

8. Sex of the child is largely ………….. determined in the human beings.

Answer

Answer: genetically

---

9. The germ cells combine to restore the normal number of ………….. in the progeny.

Answer

Answer: chromosomes

---

10. Charles Darwin put forth the idea of ………….. selection for the evolution of species.

Answer

Answer: natural

---

Match the following columns

Column I	Column II
(i) Father of Genetics	(a) Kale
(ii) Origin of species	(b) Fossil
(iii) Wings of bat and butterfly	(c) Classification of organisms
(iv) Eye spots	(d) Kohlrabi
(v) Ammonite	(e) Homologous organs
(vi) Selection for larger leaves	(f) Gregor Mendel
(vii) Evolutionary relationships	(g) Analogous organs
(viii) Selection for swollen parts	(h) Charles Darwin
(ix) Limbs of frog and human	(i) Planaria

Answer

Answer:

Column I	Column II
(i) Father of Genetics	(f) Gregor Mendel
(ii) Origin of species	(h) Charles Darwin
(iii) Wings of bat and butterfly	(g) Analogous organs
(iv) Eye spots	(i) Planaria
(v) Ammonite	(c) Classification of organisms
(vi) Selection for larger leaves	(a) Kale
(vii) Evolutionary relationships	(b) Fossil
(viii) Selection for swollen parts	(d) Kohlrabi
(ix) Limbs of frog and human	(e) Homologous organs

---

Crossword

Across:
1. They are one of the evidence of evolution [6]
2. A term for group of interbreeding organisms [7]
4. Segment of DNA which has information for a character [4]
5. Traits gained during lifetime [8]
9. Organisms do this to perpetuate their own kind [9]
10. Traits like earlobe are its example [9]
Down:
3. Transmission of characters from parents to offspring [8]
7. It is a nucleic acid [3]
6. Alternative forms of the same character [6]
8. Term used for the offspring of two plants or animals of different species [6]

Answer

Answer:
Across :
1. Fossil
2. Species
4. Gene
5. Inherited
9. Reproduce
10. Variants

Down:
3. Acquired
6. Traits
7. DNA
8. Progeny

---

We hope the given NCERT MCQ Questions for Class 10 Science Chapter 9 Heredity and Evolution with Answers Pdf free download will help you. If you have any queries regarding Heredity and Evolution CBSE Class 10 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 10 Science Chapter 8 How do Organisms Reproduce? with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided How do Organisms Reproduce? Class 10 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-10-science-chapter-8/

You can refer to NCERT Solutions for Class 10 Science Chapter 8 How do Organisms Reproduce? to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

How do Organisms Reproduce? Class 10 MCQs Questions with Answers

How Do Organisms Reproduce Class 10 MCQ Question 1.
Hydra usually reproduces by:
(a) fragmentation and budding
(b) regeneration and budding
(c) multiple fission and fragmentation
(d) regeneration

Answer

Answer: (b) regeneration and budding

---

Reproduction Class 10 MCQ Question 2.
Tubectomy is carried out by blocking the
(a) oviduct
(b) uterus
(c) cervix
(d) vagina

Answer

Answer: (a) oviduct

---

How Do Organisms Reproduce MCQ Question 3.
Variations occur as a result of
(a) asexual reproduction
(b) vegetative propagation
(c) sexual reproduction
(d) regeneration

Answer

Answer: (c) sexual reproduction

---

Class 10 Science Chapter 8 MCQ Question 4.
Fertilisation occurs in human female when the sperms and ovum reach simultaneously at
(a) fallopian tube
(b) uterus
(c) vagina
(d) cervix

Answer

Answer: (a) fallopian tube

---

Class 10 How Do Organisms Reproduce MCQ Question 5.
AIDS is a sexually transmitted disease caused due to an infection by a
(a) bacteria
(b) protozoa
(c) virus
(d) Plasmodium

Answer

Answer: (c) virus

---

MCQ Of How Do Organisms Reproduce Question 6.
In the list of organisms given below, those that reproduce by the asexual method are
{i) banana
(ii) dog
(iii) yeast
(iv) Amoeba
(a) (ii) and (iv)
(b) (i), (iii) and (iv)
(c) (i) and (iv)
(d) (ii), (iii) and (iv)

Answer

Answer: (b) (i), (iii) and (iv)

---

How Do Organisms Reproduce Class 10 MCQ With Answers Question 7.
Which of the following is the correct sequence of events of sexual reproduction in a flower?
(а) pollination, fertilisation, seedling, embryo
(b) seedling, embryo, fertilisation, pollination
(c) pollination, fertilisation, embryo, seedling
(d) embryo, seedling, pollination, fertilisation

Answer

Answer: (c) pollination, fertilisation, embryo, seedling

---

Reproduction MCQs Class 10 Question 8.
Offspring formed by asexual method of reproduction have greater similarity among themselves because
(i) asexual reproduction involves only one parent
(ii) asexual reproduction does not involve gametes
(iii) asexual reproduction occurs before sexual reproduction
(iv) asexual reproduction occurs after sexual reproduction
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)

Answer

Answer: (a) (i) and (ii)

---

MCQ On Reproduction In Organisms Pdf Class 10 Question 9.
Characters that are transmitted from parents to offspring during reproduction show
(a) only similarities with parents
(b) only variations with parents
(c) both similarities and variations with parents
(d) neither similarities nor variations

Answer

Answer: (c) both similarities and variations with parents

---

Class 10 Reproduction MCQ Question 10.
In Spirogyra, asexual reproduction takes place by
(a) breaking up of filaments into smaller bits
(b) division of a cell into two cells
(c) division of a cell into many cells
(d) formation of young cells from older cells.

Answer

Answer: (a) breaking up of filaments into smaller bits

---

MCQ Reproduction Class 10 Question 11.
The ability of a cell to divide into several cells during reproduction in Plasmodium is called
(a) budding
(b) reduction division
(c) binary fission
(d) multiple fission

Answer

Answer: (d) multiple fission

---

MCQ On How Do Organisms Reproduce Class 10 Question 12.
The correct sequence of reproductive stages seen in flowering plants is
(а) gametes, zygote, embryo, seedling
(b) zygote, gametes, embryo, seedling
(c) seedling, embryo, zygote, gametes
(d) gametes, embryo, zygote, seedling

Answer

Answer: (а) gametes, zygote, embryo, seedling

---

MCQ On How Do Organisms Reproduce Question 13.
The number of chromosomes in parents and offsprings of a particular species remains constant due to
(a) doubling of chromosomes after zygote formation
(b) halving of chromosomes during gamete formation
(c) doubling of chromosomes after gamete formation
(d) halving of chromosomes after gamete formation

Answer

Answer: (b) halving of chromosomes during gamete formation

---

How Do Organisms Reproduce Class 10 MCQ Pdf Question 14.
Factors responsible for the rapid spread of bread mould on slices of bread are
(i) large number of spores
(ii) availability of moisture and nutrients in bread
(iii) presence of tubular branched hyphae
(iv) formation of round shaped sporangia
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (ii)
(d) (iii) and (iv)

Answer

Answer: (c) (i) and (ii)

---

Ch 8 Science Class 10 MCQ Question 15.
Length of pollen tube depends on the distance between
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style

Answer

Answer: (b) pollen grain on upper surface of stigma and ovule

---

Question 16.
Which of the following statements are true for flowers?
(i) Flowers are always bisexual
(ii) They are the sexual reproductive organs
(iii) They are produced in all groups of plants
(iv) After fertilisation they give rise to fruits
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)

Answer

Answer: (d) (ii) and (iv)

---

Question 17.
Which among the following statements are true for unisexual flowers?
(i) They possess both stamen and pistil
(ii) They possess either stamen or pistil
(iii) They exhibit cross pollination
(iv) Unisexual flowers possessing only stamens cannot produce fruits
(a) (i) and (iv)
(b) (ii), (iii) and (iv)
(c) (iii) and (iv)
(d) (i), (iii) and (iv)

Answer

Answer: (b) (ii), (iii) and (iv)

---

Question 18.
Which among the following diseases is not sexually transmitted?
(a) Syphillis
(b) Hepatitis
(c) HIV – AIDS
(d) Gonorrhoea

Answer

Answer: (b) Hepatitis

---

Question 19.
In human males, the testes lie in the scrotum, because it helps in the
(a) process of mating
(b) formation of sperm
(c) easy transfer of gametes
(d) all the above

Answer

Answer: (b) formation of sperm

---

Question 20.
In following Figure, the parts A, B and C are sequentially

(a) cotyledon, plumule and radicle
(b) plumule, radicle and cotyledon
(c) plumule, cotyledon and radicle
(d) radicle, cotyledon and plumule

Answer

Answer: (c) plumule, cotyledon and radicle

---

Question 21.
Reproduction is essential for living organisms in order to
(a) keep the individual organism alive
(b) fulfill their energy requirement
(c) maintain growth
(d) continue the species generation after generation

Answer

Answer: (d) continue the species generation after generation

---

Question 22.
During adolescence, several changes occur in the human body. Mark one change associated with sexual maturation in boys
(a) loss of milk teeth
(b) increase in height
(c) cracking of voice
(d) weight gain

Answer

Answer: (c) cracking of voice

---

Question 23.
Offspring formed as a result of sexual reproduction exhibit more variations because
(a) sexual reproduction is a lengthy process
(b) genetic material comes from two parents of the same species
(c) genetic material comes from two parents of different species
(d) genetic material comes from many parents

Answer

Answer: (b) genetic material comes from two parents of the same species

---

Fill in the blanks

1. Inbuilt tendency for …………… during reproduction is the basis for evolution.

Answer

Answer: variation

---

2. The spores in Rhizopus are covered by …………… to protect them.

Answer

Answer: thick walls

---

3. The transfer of pollen from one flower to the stigma of another flower is called as ……………

Answer

Answer: cross pollination

---

4. A special tissue which provides nutrition to the embryo in the uterus is called ……………

Answer

Answer: placenta

---

5. To nourish the …………… lining of uterus thickens and gets richly supplied with blood.

Answer

Answer: Embryo

---

6. Sex ratio is declining at an alarming rate in some sections of our society due to …………… foeticide.

Answer

Answer: female

---

7. To prevent the egg from reaching the uterus, the …………… is blocked in human female.

Answer

Answer: fallopian tube

---

8. The …………… convert into seeds and ovary converts into …………… after fertilisation in a flowering plant.

Answer

Answer: ovules, fruit

---

9. A contraceptive device called the loop or …………… is placed in the uterus to prevent pregnancy.

Answer

Answer: copper-T

---

10. Gonorrhoea and syphilis are …………… infections while infections such as warts are …………… infections.

Answer

Answer: bacterial, viral

---

Match the following columns

Column I	Column II
(i) Sexual maturity	(a) Placenta
(ii) Syphilis	(b) Hormonal balance
(iii) Callus	(c) Urethra
(iv) Oral pills	(d) Cervix
(v) Male hormone	(e) Puberty
(vi) Vas deferens	(f) Bacteria
(vii) Common passage for sperms and urine	(g) Tissue culture
(viii) Opening of uterus into vagina	(h) Testosterone
(ix) Gaseous exchange	(i) Vasectomy

Answer

Answer:

Column I	Column II
(i) Sexual maturity	(e) Puberty
(ii) Syphilis	(f) Bacteria
(iii) Callus	(g) Tissue culture
(iv) Oral pills	(b) Hormonal balance
(v) Male hormone	(h) Testosterone
(vi) Vas deferens	(i) Vasectomy
(vii) Common passage for sperms and urine	(c) Urethra
(viii) Opening of uterus into vagina	(d) Cervix
(ix) Gaseous exchange	(a) Placenta

---

We hope the given NCERT MCQ Questions for Class 10 Science Chapter 8 How do Organisms Reproduce? with Answers Pdf free download will help you. If you have any queries regarding How do Organisms Reproduce? CBSE Class 10 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 10 Science Chapter 7 Control and Coordination with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Control and Coordination Class 10 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-10-science-chapter-7/

You can refer to NCERT Solutions for Class 10 Science Chapter 7 Control and Coordination to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Control and Coordination Class 10 MCQs Questions with Answers

Control And Coordination Class 10 MCQ Question 1.
Which of the following statements is correct about receptors?
(a) Gustatory receptors detect taste while olfactory receptors detect smell
(b) Both gustatory and olfactory receptors detect smell
(c) Auditory receptors detect smell and olfactory receptors detect taste
(d) Olfactory receptors detect taste and gustatory receptors smell

Answer

Answer: (a) Gustatory receptors detect taste while olfactory receptors detect smell

---

Control And Coordination MCQ Question 2.
Electrical impulse travels in a neuron from
(a) Dendrite axon → axonal end → cell body
(b) Cell body → dendrite → axon → axonal end
(c) Dendrite → cell body → axon → axonal end
(d) Axonal end → axon → cell body → dendrite

Answer

Answer: (c) Dendrite → cell body → axon → axonal end

---

MCQ On Control And Coordination Question 3.
In a synapse, chemical signal is transmitted from
(a) dendritic end of one neuron to axonal end of another neuron
(b) axon to cell body of the same neuron
(c) cell body to axonal end of the same neuron
(d) axonal end of one neuron to dendritic end of another neuron

Answer

Answer: (d) axonal end of one neuron to dendritic end of another neuron

---

Class 10 Science Chapter 7 MCQ Question 4.
In a neuron, conversion of electrical signal to a chemical signal occurs at/in
(a) cell body
(b) axonal end
(c) dendritic end
(d) axon

Answer

Answer: (b) axonal end

---

MCQ Of Control And Coordination Question 5.
Which is the correct sequence of the components of a reflex arc?
(a) Receptors → Muscles → Sensory neuron → Motor neuron → Spinal cord
(b) Receptors → Motor neuron → Spinal cord → Sensory neuron → Muscle
(c) Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle
(d) Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Answer

Answer: (d) Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

---

Class 10 Control And Coordination MCQ Question 6.
Which of the following statements are true?
(i) Sudden action in response to something in the environment is called reflex action
(ii) Sensory neurons carry signals from spinal cord to muscles
(iii) Motor neurons carry signals from receptors to spinal cord
(iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc
(a) (i) and (ii)
(b) (i) and (iii)
(c) (i) and (iv)
(d) (i), (ii) and (iii)

Answer

Answer: (c) (i) and (iv)

---

Control And Coordination MCQ With Answers Pdf Question 7.
Which of the following statements are true about the brain?
(i) The main thinking part of the brain is hind brain.
(ii) Centres of hearing, smell, memory, sight, etc. are located in fore brain.
(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain.
(iv) Cerebellum does not control posture and balance of the body.
(a) (i) and (ii)
(b) (i), (ii) and (iii)
(c) (ii) and (iii)
(d) (iii) and (iv)

Answer

Answer: (c) (ii) and (iii)

---

MCQ Of Control And Coordination Class 10 Question 8.
Posture and balance of the body is controlled by
(a) cerebrum
(b) cerebellum
(c) medulla
(d) pons

Answer

Answer: (b) cerebellum

---

Control And Coordination Class 10 MCQ With Answers Question 9.
Spinal cord originates from
(a) cerebrum
(b) medulla
(c) pons
(d) cerebellum

Answer

Answer: (b) medulla

---

Class 10 Chapter 7 Science MCQ Question 10.
The movement of shoot towards light is
(a) geotropism
(b) hydrotropism
(c) chemotropism
(d) phototropism

Answer

Answer: (d) phototropism

---

MCQ Questions For Class 10 Science Chapter 7 Question 11.
The main function of abscisic acid in plants is to
(a) increase the length of cells
(b) promote cell division
(c) inhibit growth
(d) promote growth of stem

Answer

Answer: (c) inhibit growth

---

Control And Coordination Class 10 MCQs Question 12.
Which of the following is not associated with growth of plant?
(a) Auxin
(b) Gibberellins
(c) Cytokinins
(d) Abscisic acid

Answer

Answer: (d) Abscisic acid

---

Control And Coordination MCQ With Answers Question 13.
Iodine is necessary for the synthesis of which hormone?
(a) Adrenaline
(b) Thyroxin
(c) Auxin
(d) Insulin

Answer

Answer: (b) Thyroxin

---

Control And Coordination MCQ Class 10 Question 14.
Choose the incorrect statement about insulin
(a) It is produced from pancreas
(b) It regulates growth and development of the body
(c) It regulates blood sugar level
(d) Insufficient secretion of insulin will cause diabetes

Answer

Answer: (b) It regulates growth and development of the body

---

MCQs On Control And Coordination Question 15.
Select the mis-matched pair:
(a) Adrenaline : Pituitary gland
(b) Testosterone : Testes
(c) Estrogen : Ovary
(d) Thyroxin : Thyroid gland

Answer

Answer: (a) Adrenaline : Pituitary gland

---

Question 16.
The shape of guard cells changes due to change in the
(a) protein composition of cells
(b) temperature of cells
(c) amount of water in cells
(d) position of nucleus in the cells

Answer

Answer: (c) amount of water in cells

---

Question 17
The growth of tendril in pea plants is due to
(a) effect of light
(b) effect of gravity
(c) rapid cell divisions in tendrillar cells that are away from the support
(d) rapid cell divisions in tendrillar cells in contact with the support

Answer

Answer: (c) rapid cell divisions in tendrillar cells that are away from the support

---

Question 18.
The growth of pollen tubes towards ovules is due to
(a) hydrotropism
(b) chemotropism
(c) geotropism
(d) phototropism

Answer

Answer: (b) chemotropism

---

Question 19.
The movement of sunflower in accordance with the path of Sun is due to
(a) phototropism
(b) geotropism
(c) chemotropism
(d) hydrotropism

Answer

Answer: (a) phototropism

---

Question 20.
The substance that triggers the fall of mature leaves and fruits from plants is due to
(a) auxin
(b) gibberellin
(c) abscisic acid
(d) cytokinin

Answer

Answer: (c) abscisic acid

---

Question 21.
Which of the following statements about transmission of nerve impulse is incorrect?
(a) Nerve impulse travels from dendritic end towards axonal end.
(b) At the dendritic end electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron.
(c) The chemicals released from the axonal end of one neuron cross the synapse and generate a similar electrical impulse in a dendrite of another neuron.
(d) A neuron transmits electrical impulses not only to another neuron but also to muscle and gland cells.

Answer

Answer: (b) At the dendritic end electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron.

---

Question 22.
Involuntary actions in the body are controlled by
(a) medulla in fore brain
(b) medulla in mid brain
(c) medulla in hind brain
(d) medulla in spinal cord

Answer

Answer: (c) medulla in hind brain

---

Question 23.
Which of the following is not an involuntary action?
(a) Vomiting
(b) Salivation
(c) Heart beat
(d) Chewing

Answer

Answer: (d) Chewing

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Question 24.
When a person is suffering from severe cold, he or she cannot
(а) differentiate the taste of an apple from that of an ice cream
(b) differentiate the smell of a perfume from that of an agarbatti
(c) differentiate red light from green light
(d) differentiate a hot object from a cold object

Answer

Answer: (b) differentiate the smell of a perfume from that of an agarbatti

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Question 25.
What is the correct direction of flow of electrical impulses?

Answer

Answer: (c)

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Question 26.
Which statement is not true about thyroxin?
(а) Iron is essential for the synthesis of thyroxin
(b) It regulates carbohydrates, protein and fat metabolism in the body
(c) Thyroid gland requires iodine to synthesise thyroxin
(d) Thyroxin is also called thyroid hormone

Answer

Answer: (а) Iron is essential for the synthesis of thyroxin

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Question 27.
Dwarfism results due to
(a) Excess secretion of thyroxin
(b) Less secretion of growth hormone
(c) Less secretion of adrenaline
(d) Excess secretion of growth hormone

Answer

Answer: (b) Less secretion of growth hormone

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Question 28.
Dramatic changes of body features associated with puberty are mainly because of secretion of
(а) oestrogen from testes and testosterone from ovary
(b) estrogen from adrenal gland and testosterone from pituitary gland
(c) testosterone from testes and estrogen from ovary
(d) testosterone from thyroid gland and estrogen from pituitary gland

Answer

Answer: (c) testosterone from testes and estrogen from ovary

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Question 29.
A doctor advised a person to take an injection of insulin because
(a) his blood pressure was low
(b) his heart was beating slowly
(c) he was suffering from goitre
(d) his sugar level in blood was high

Answer

Answer: (d) his sugar level in blood was high

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Question 30.
The hormone which increases the fertility in males is called
(a) oestrogen
(b) testosterone
(c) insulin
(d) growth hormone

Answer

Answer: (b) testosterone

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Question 31.
Which of the following endocrine glands is unpaired?
(a) Adrenal
(b) Testes
(c) Pituitary
(d) Ovary

Answer

Answer: (c) Pituitary

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Question 32.
Junction between two neurons is called
(a) cell junction
(b) neuro muscular junction
(c) neural joint
(d) synapse

Answer

Answer: (d) synapse

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Question 33.
In humans, the life processes are controlled and regulated by
(a) reproductive and endocrine systems
(b) respiratory and nervous systems
(c) endocrine and digestive systems
(d) nervous and endocrine systems

Answer

Answer: (d) nervous and endocrine systems

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Fill in the blanks

1. The information is acquired by the tip of the ………… of a nerve cell which sets off ………… impulse in it.

Answer

Answer: dendrite, electrical

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2. Chemicals released from the nerve endings of one neuron travel through a gap called …………. to reach the next neuron.

Answer

Answer: Synapse

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3. The fundamental unit of the tissues for conducting information via electrical impulses from one part of the body to another are called ………… or …………

Answer

Answer: nerve cells, neurons

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4. The ………… are the quick responses produced involuntarily in human beings to protect them from the situation which may be dangerous to them e.g., touching a hot object.

Answer

Answer: reflex actions

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5. The centre associated with hunger which gives a sensation of feeling full is present in the ………… part of the human brain.

Answer

Answer: fore brain

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6. The spinal cord is protected by the ………… or the backbone.

Answer

Answer: vertebral column

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7. Directional movement in seedling is a ………… dependent movement.

Answer

Answer: growth

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8. Movement of roots away from light is an example of ………… phototropism.

Answer

Answer: negative

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9. The plant hormone called ………… is involved in inhibiting growth and cause wilting of leaves.

Answer

Answer: Abscisic acid

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10. The element ………… is needed for the synthesis of thyroxin.

Answer

Answer: iodine

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Match the following columns

Column I	Column II
(i) Thyroxin	(a) Puberty
(ii) Chemotropism	(b) Adrenaline
(ii) Body posture	(c) Tendril
(iv) Negative geotropism	(d) Gustatory
(v) Estrogen	(e) Goitre
(vi) Response to touch	(f) Cerebellum
(vii) Cell division	(g) Shoot system
(viii) Emergency situations	(h) Pollen tube
(ix) Taste	(i) Cytokinin

Answer

Answer:

Column I	Column II
(i) Thyroxin	(e) Goitre
(ii) Chemotropism	(h) Pollen tube
(ii) Body posture	(f) Cerebellum
(iv) Negative geotropism	(g) Shoot system
(v) Estrogen	(a) Puberty
(vi) Response to touch	(c) Tendril
(vii) Cell division	(i) Cytokinin
(viii) Emergency situations	(b) Adrenaline
(ix) Taste	(d) Gustatory

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