The hollow crater formed during gastrulation is known as the
A) acrosome.
B) archenteron.
C) morulla.
D) cleavage furrow.
E) trophoblast.
Correct Answer:
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Q13: _ is the initial event in development.
A)Fertilization
B)Cleavage
C)Gastrulation
D)Organogensis
Q14: The trophoblast implants into the endometrial lining
Q15: The appearance of the _ in the
Q16: In mammals,the embryonic cells form an inner
Q17: Birth occurs in response to uterine contractions
Q19: During the _ month,morphogenesis,the formation of the
Q20: Together,the chorionic frondosum and decidua basalis form
Q21: All of the following occur within the
Q22: Neurulation is the developmental stage in which
Q23: The neural crest produces all of the
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