The growth of pollen tube towards ovule is due to a) hydrotropism b) chemotropism c) geotropism d) photoyropism.
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Answer:
Chemotropism
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4
Answer:
(b) Chemotropism.
Explanation:
It is the growth of the plant with response to chemical stimulus.The growth of a pollen tube down the style during fertilisation is due to the presence of sugar in the style. The ovary releases chemicals that influence the development of pollen tube. It is an example for positive chemotropism.
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