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Control and Coordination — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceControl and Coordination3 Marks
Question
What is meant by positive tropism and negative tropism? Explain with examples.
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Answer

The growth of a plant part in response to a stimulus is called positive tropism and if the growth of a plant part is away from the stimulus, then it is called negative tropism. Example: The roots of a plant go towards earth in response to gravity is an example of positive geotropism whereas stem grows away from earth against gravity is an example of negative geotropism.

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