Which event of fertilization occurs first?
A) vitelline layer hardens
B) the entry of sperm DNA into the egg
C) cleavage
D) the acrosomal reaction
E) the cortical reaction
Correct Answer:
Verified
Q55: Mesoderm gives rise to
A)epidermis.
B)respiratory tract.
C)digestive tract.
D)skeletal muscle.
E)peripheral
Q56: Once an egg has been fertilized,what event
Q57: The central nervous system first forms during
A)fertilization.
B)cleavage.
C)neurulation.
D)gastrulation.
E)organogenesis.
Q58: Neural crest cells at the dorsal surface
Q59: The endoderm is a germ cell layer
Q61: Why don't chickens menstruate?
A)It has been bred
Q62: The posterior end of the neural tube
Q63: You are a chemist designing a test
Q64: One type of illegal doping in sports
Q65: Human eggs undergo holoblastic cleavage during development.
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