Growth of pollen tube towards ovule is an example of

Thigmotropism

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Geotropism

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Hydrotropism

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Chemotropism

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Solution

The correct option is D Chemotropism
Tropism or tropic movements are directional movements induced by external stimuli. Chemotropism is induced by the unidirectional stimulus of chemicals, such as the growth of pollen tube towards the ovule.

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