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Question
What is a tropic movement? Explain with an example.
Solution
The movements which are in a particular direction in relation to the stimulus are called tropic movements. Tropic movements happen because of growth of a plant in a particular direction. There are four types of tropic movements, viz. geotropic, phototrophic, hydrotropic and thermotropic.
Example: Roots usually show positive geotropic movement, i.e., they grow in the direction of the gravity. Stems usually show negative geotropic movement.
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