NCERT Class X Science Class: Chapter – 7. Control and Coordination – Part-7 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 35:

Name the plant hormones responsible for the following

(a) Elongation of cells

(b) Growth of stem

(c) Promotion of cell division

(d) Falling of senescent leaves.

Answer:

(a) Auxin

(b) Gibberellin

(c) Cytokinin

(d) Abscisic acid

Question 36:

Label the endocrine glands in Figure.

Image the Endocrine Glands in Figure

Answer:

Image the Endocrine Glands and Its Part

Question 37:

In Figure (a) , (b) and (c) , which appears more accurate and why?

(a)

Image the Plant Shoots (A)

(b)

Image the Plant Shoots (B)

(c)

Image the Plant Shoots (C)

Answer:

Figure (a) is more appropriate because in a plant shoots are negatively geotropic hence, grow upwards and roots are positively geotropic so grow downwards.