why do pollen grains have a tough protective coat?
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Pollen grains have a tough protective coat which protects the sperm cells at the time of their movement from stamen to the pistil of flowering plants. It protects the sperms from all type of adverse situations.
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Answer:
Pollen grains have a tough protective coat which protects the sperm cells at the time of their movement from stamen to the pistil of flowering plants. It protects the sperms from all type of adverse situations.
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