the growth of pollen tube towards ovule is known as A) thigmotropism B) chemotropism C) hydrotropism D) geotropism
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Answer:
The growth of pollen tubes towards ovules is due to chemotropism. Chemo-tropism is growth of organisms such as bacteria and plants, navigated by chemical stimuli from outside of the organism or organism's part.
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Answer:
b) chemotropism
Explanation:
The tip of the pollen tube is directed towards the ovule by a chemical (studies show that calcium plays an important role as the chemical stimulus), and so this is an example of positive chemotropism.
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