The sperm penetrates the ovum mainly by:

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(B) The correct answer is $B$. The sperm penetrates the ovum primarily through chemical means. Specifically,the acrosome of the sperm releases enzymes

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Chemically

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(B) The correct answer is $B$. The sperm penetrates the ovum primarily through chemical means. Specifically,the acrosome of the sperm releases enzymes,such as hyaluronidase,which digest the hyaluronic acid in the corona radiata and the zona pellucida of the ovum. This enzymatic action allows the sperm to pass through the protective layers of the egg,facilitating fertilization.

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