
The phase during which embryonic cells arrange themselves into three layers is called:
A) cleavage.
B) gastrulation.
C) organogenesis.
D) fertilization.
E) induction.
Correct Answer:
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Q4: In sea urchin development,the archenteron becomes the:
A)ectoderm.
B)endoderm.
C)digestive
Q5: Which of the following is a process
Q6: Migration of which of the following to
Q7: The blastocoel is:
A)a fertilized egg.
B)the group of
Q8: During which stage of development do cells
Q10: At which of the following levels does
Q11: Place the following steps of organogenesis in
Q12: A difference between a morula and a
Q13: Which cells are most important in initiating
Q14: What is the effect of higher concentration
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