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Assertion: The middle piece is called as...

Assertion: The middle piece is called as power house of the sperm.
Reason: The numerous mitochondria coiling around axial filament produce energy for the movement of the tail.

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The correct Answer is:
A
The middle piece of human sperm contains the mitochondria cloiled. Around the axial filament called mitochondrial spiral. They provide energy for the movement of the sperm So it is called as the power house of the sperm.
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