PLANT PHYSIOLOGY
PLANT MOVEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The growth of pollen tube towards the ovule during fertilisation in a flower is called
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positive chemotropism
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negative chemotropism
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Fertilization of flowers by pollen is achieved because the ovary release chemicals that produce a positive chemotropic response from the developing pollen tube. The growth of pollen tubes towards the ovule is an example of chemotropism.
Detailed explanation-2: -So, the correct answer is ‘Chemotropism’.
Detailed explanation-3: -Growth of plant parts in response to the stimulus, chemical (’Chemo’) is called chemotropism. The pollen tubes grow towards the ovule in response to certain chemicals released by the ovules.
Detailed explanation-4: -angiosperm fertilization The pollen tube ultimately enters an ovule through the micropyle and penetrates one of the sterile cells on either side of the egg (synergids).
There is 1 question to complete.