The extra-embryonic membrane that forms a fluid-filled sac is the
A) yolk sac.
B) amnion.
C) allantois.
D) All of the answers are correct.
E) None of the answers is correct.
Correct Answer:
Verified
Q27: Endoderm + mesoderm = which extra-embryonic membrane(s)?
A)chorion
B)amnion
C)allantois
D)yolk
Q28: Q29: The mesoderm and the cytotrophoblast combine to Q30: All of the following are true of Q31: The trophoblast has many of the characteristics Q33: Which of the following descriptors regarding the Q34: The ectoderm forms Q37: During gastrulation, Q40: The mesoderm forms Q71: Figure 29-1 Early Human Development
A)muscle.
B)blood.
C)neural tissues.
D)the lining of the
A)the blastomeres fuse.
B)the placenta penetrates the
A) muscle.
B) epidermis.
C) the brain.
D)
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