During the process of fertilization, which step happens first? The sperm’s nucleus enters the oocyte cell. Enzymes break down the protective layer of the oocyte. A sperm attaches to an oocyte. The plasma

During the process of fertilization, which step happens first?

The sperm’s nucleus enters the oocyte cell.
Enzymes break down the protective layer of the oocyte.
A sperm attaches to an oocyte.
The plasma membrane of the oocyte changes.

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