Q.

Head of sperm contains

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haploid nucleus

diploid nucleus

mitochondria

axoneme

answer is A.

(Detailed Solution Below)

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Detailed Solution

Sperm is a microscopic structure composed of a head, neck, a middle piece, and a tail.

The sperm head contains an elongated haploid nucleus, the anterior portion of which is covered by a cap-like structure, acrosome. The acrosome is filled with enzymes that help in fertilisation of the ovum.

The middle section has a lot of mitochondria, which create energy for the tail movement. This helps sperm motility, which is important for fertilisation.

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