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The growth of pollen tubes towards ovules is due to:

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The growth of pollen tubes towards ovules is due to:

A. Hydrotropism 

B. Chemotropism 

C. Geotropism 

D. Phototropism

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Growth of pollen tubes is a directional movement which takes place due to the chemical secretion of the ovule. Therefore, growth of pollen tubes towards ovules is due to chemotropism.

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