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ICSE Class 10 Biology Question 25 of 30

Solved Sample Paper 4 — Question 25

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Question 7(v)

The diagram given below shows a type of tropism. Answer the questions that follows.

Diagram shows a type of tropism. What do A and B indicate? Name the tropic movements shown by parts A and B. Why do A and B show these types of movement? Biology Sample Paper Solved ICSE Class 10.

(a) What do A and B indicate?

(b) Name the tropic movements shown by parts A and B.

(c) Why do A and B show these types of movement?

Answer

(a)

  • A → roots growing towards earth's gravity
  • B → stem growing towards light

(b)

  • A → geotropism
  • B → phototropism

(c) Roots exhibit positive geotropic movement as they seek to absorb water and minerals from the soil. In contrast, shoots display negative geotropic movement, aiming to grow upward towards sunlight to facilitate photosynthesis in the leaves.