NCERT Class X Science Class: Chapter –7. Control and Coordination – Part-2

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Question 7:

Which of the following statements are true about the brain?

(i) The main thinking part of brain is hind brain

(ii) Centers 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: C

Question 8:

Posture and balance of the body is controlled by

(a) Cerebrum

(b) Cerebellum

(c) Medulla

(d) Pons

Answer: B

Image the Cerebellum

Image the Cerebellum

Question 9:

Spinal cord originates from

(a) Cerebrum

(b) Medulla

(c) Pons

(d) Cerebellum

Answer: B

Image Medulla oblongata

Image Medulla Oblongata

Question 10:

The movement of shoot towards light is

(a) Geotropism

(b) Hydrotropism

(c) Chemotropism

(d) Phototropism

Answer: D

Image phototropism

Image Phototropism

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: C

Image abscisic acid

Image Abscisic Acid

Question 12:

Which of the following is not associated with growth of plant?

(a) Auxin

(b) Gibberellins

(c) Cytokines

(d) Abscisic acid

Answer: D

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