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Question

Sperm enters through which part of egg?

A
Any where in unfertilized egg from vegetal pole.
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B
From animal pole in unfertilized egg.
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C
In unfertilized egg from vegetal pole.
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D
None of the above.
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Solution

The correct option is B From animal pole in unfertilized egg.
Within minutes of fertilization, a clear cytoplasmic region forms at the animal pole, and there are extensive streaming movements within the bulk of the egg cytoplasm. The sperm enters the egg through a micropile through animal pole. Hence, option B is correct.

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