Generally,only one sperm fertilizes an egg because
A)there are so few sperm that two are unlikely to arrive at the same time.
B)sperm compete and only the most fit one is accepted.
C)many sperm enter but only one set of chromosomes fuses with the egg nucleus;excess sperm are absorbed.
D)when the first sperm membrane fuses with the egg membrane,a barrier to other sperm forms.

Question

Quizplus · Accepted Answer

When the first sperm membrane fuses with the egg membrane, a rapid change in the egg's outer layer occurs, creating a barrier that prevents other sperm from entering. This process ensures that only one sperm fertilizes the egg, maintaining the correct number of chromosomes in the resulting zygote.

Generally,only One Sperm Fertilizes an Egg Because