A sea urchin zygote undergoes its first cell division
A) 5 seconds after fertilization.
B) 30 minutes after fertilization.
C) 90 minutes after fertilization.
D) 4 hours after fertilization.
E) 24 hours after fertilization.
Correct Answer:
Verified
Q3: In mammalian eggs, the receptors for sperm
Q4: Contact of a sea urchin egg with
Q5: The formation of the fertilization membrane requires
Q6: Fertilization normally
A) reinstates diploidy.
B) follows gastrulation.
C) is
Q7: In mammals, the nuclei resulting from the
Q9: In an egg cell treated with EDTA,
Q10: During fertilization, the acrosomal contents
A) block polyspermy.
B)
Q11: The cortical reaction functions directly in the
A)
Q12: Even in the absence of sperm, metabolic
Q13: Contact of a sperm with signal molecules
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