Why is more than one sperm needed for fertilization to occur, when only one sperm actually penetrates the egg?
A)the sperm work together to lower the acidity in the uterus for survival
B)the sperm work together reduce drag as they swim up the oviduct
C)the sperm work together to surround the egg prior to fertilization
D)the sperm work together to break down the egg's protein layer
E)the sperm work together to break down the cap on the sperm's head

Question

Quizplus · Accepted Answer

Multiple sperm are needed to break down the egg's protective protein layer, the zona pellucida, through the release of enzymes, allowing one sperm to penetrate and fertilize the egg.

Why Is More Than One Sperm Needed for Fertilization to Occur