During days 8 and 9 after fertilization in humans,____.
A) amnion cleavage begins
B) a blastocyst forms
C) an embryonic disk is formed
D) implantation occurs
E) gastrulation occurs
Correct Answer:
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Q27: Q28: During pregnancy,a maternal antibody transported across the Q29: The prenatal period begins with the _ Q30: Human milk contains _. Q31: In the placenta,nutrients move from mother to Q33: Which human extraembryonic membrane forms the blood Q34: Most neurons have formed by the _,allowing Q35: In humans,the term embryo refers to the
A) calcium only
B)
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