How Is Polyspermy Prevented During the Fertilization of an Egg

question 4

Multiple Choice

How is polyspermy prevented during the fertilization of an egg?

• A) the corona radiata hardens
• B) the ZP3 glycoproteins are inactivated
• C) the egg secretes toxins that kill other penetrating sperms
• D) the acrosomal enzymes harden the zona pellucida
• E) the cell membrane of the oocyte polarizes

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