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Question
what is a blastocyst?
a.the 5-day-old zygote that becomes implanted in the uterine wall
b.the terminal end of the umbilical cord that attaches to the placenta
c.fingerlike projections on the uterine wall that act to separate fetal from maternal tissues
d.the network of placental blood vessels that exchanges nutrients and waste products from mother to fetus
Answer
This answer is hidden. It contains 1 characters.
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