ICSE Class X Biology 2019 Solved Papers

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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 :
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Question : 40
Total: 96
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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