This is composed of the syncytiotrophoblast and the cytotrophoblast. 
A) A
B) B
C) C
D) D
E) E
Correct Answer:
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Q28: What does diagram "A" represent? 
Q29: This was formerly called the blastocyst cavity.
Q30: These cells are derived from the yolk
Q31: Which one represents the morula stage?
Q33: What is line "A" pointing to?
Q34: Where is the amniotic cavity?
Q36: Where are the fetal blood vessels?
Q37: This is a permanent change in an
Q39: When phenotype can be drastically different depending
Q40: An example of incomplete dominance is
A)ABO blood
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