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Question

What is tropism?? Explain in easy way.


Solution

When animals, including humans, respond to a stimulus (which is something that causes a response), we call it a reaction. For example, if someone touches your arm, you generally turn to react. In plants, the response to a stimulus is known as a tropism
Plants show two different types of movements, one is independent of growth and the other is dependent on growth.
The movement of a plant part in response to light is called phototropism
The movement of a plant part in response to gravity is called geotropism.
The movement of a plant part in response to chemicals is called chemotropism.
The movement of a plant part in response to water is called hydrotropism.
The directional movement of a plant part in response to touch of an object is called thigmotropism
 

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