Question

what material do you require to observe tropic movements in stem tip and root tip​

Answer 1

Actually we don't need any material. It is just a response to stimulus.

Example like sunflower

I hope this will help u

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Answer 2

Answer:

Hydrogen peroxide

Hydrogen peroxide is the material required to observe tropic movements in stem trip and root trip. The growth of the plant in tropic movements is towards or away from the stimulus.