ICSE Class X Biology 2019 Solved Papers

SECTION - II

Given below is an experimental setup to demonstrate a particular tropic movement in germinating seeds. Study the diagram and answer the questions that follow :

Question : 40 of 96

Marks: +1, -0

What is Thigmotropism ? Give one example.

Solution:

Growth or Movement of a plant part in response to stimulus of touch is called Thigmotropism eg. Shoot of weak stemmed plant twines around a support as soon as it comes in contact with it such as sweet peas.

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