Figure 27-1
-Identify the stage labeled "12."
A) zygote
B) morula
C) blastocyst
D) trophoblast
E) cytotrophoblast
Correct Answer:
Verified
Q23: The endoderm forms
A) muscle.
B) blood.
C) neural tissue.
D)
Q23: The extra-embryonic membrane that forms blood cells
Q25: Identify what process is occurring at the
Q27: Endoderm + mesoderm = which extra-embryonic membrane(s)?
A)chorion
B)amnion
C)allantois
D)yolk
Q29: The mesoderm and the cytotrophoblast combine to
Q30: All of the following are true of
Q31: The trophoblast has many of the characteristics
Q32: The region known as the primitive streak
Q32: The extra-embryonic membrane that forms a fluid-filled
Q33: Which of the following descriptors regarding the
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