Multiple Choice
In sea urchins, the "fast block" and the longer lasting "slow block" to polyspermy, respectively, are
A) the acrosomal reaction and the formation of egg white.
B) the cortical reaction and the formation of yolk protein.
C) the jelly coat of the egg and the vitelline membrane.
D) membrane depolarization and the cortical reaction.
E) inactivation of the sperm acrosome.
Correct Answer:
Verified
Correct Answer:
Verified
Q32: If gastrulation was blocked by an environmental
Q33: Which of the following correctly displays the
Q34: What structural adaptation in chickens allows them
Q35: The cortical reaction functions directly in the<br>A)
Q36: During the early part of the cleavage
Q38: Although it contributes no cells to the
Q39: In a newly fertilized egg, the vitelline
Q40: In a developing frog embryo, most of
Q41: An embryo with meroblastic cleavage, extraembryonic membranes,
Q42: The pattern of embryonic development in which