By day 12 of embryonic development,mesoderm begins to form through
A) embryolization.
B) gastrulation.
C) mitosis.
D) meiosis.
E) None of the answers is correct.
Correct Answer:
Verified
Q21: The trophoblast has many of the characteristics
Q23: The endoderm forms
A) muscle.
B) blood.
C) neural tissue.
D)
Q24: Initially,the nutrients absorbed by the trophoblast easily
Q26: The mesoderm and the trophoblast combine to
Q28: During implantation, the
A) trophoblast erodes a path
Q30: A blastocyst is a(n)
A) extraembryonic membrane.
B) solid
Q31: During gastrulation,
A) the blastomeres fuse.
B) the placenta
Q32: The region known as the primitive streak
Q35: Under the influence of the trophoblast, maternal
Q37: The solid ball of cells that has
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