Q34 of 231 Page 94

Define phototropism. Give one example of phototropism.

Phototropism is the movement of a plant part in response to a stimulus (light).


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33

What are the different types of tropisms? Define each type of tropism. Write the name of stimulus in each case.

 33

How do tropisms differ from nasties (or nastic movements)?

 34

How does phototropism occur in a plant stem (or shoot)? Explain with the help of labelled diagrams.

 34

What is meant by positive phototropism and negative phototropism? Give one example of each type.