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A student is spending the summer studying the development of rabbits. The student is experimenting with in vitro fertilization of oocytes isolated from one of the rabbits.

When she exposes the egg to several hundred sperm, what observations would she make?


Formation of the zona pellucida and entry of the entire sperm into the oocyte.


Extrusion of second polar body, initiation of the cortical reaction.


Multiple sperm entry with subsequent apoptosis of the oocyte.


Degeneration of the oocyte since it is not implanted in the endometrium of the uterus.

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