At 10 weeks, the blastula becomes an embryo. True or False?
Correct Answer:
Verified
Q57: _ diffuse(s)from fetal blood to maternal blood
Q58: In the placenta:
A)chorionic villi are bathed in
Q59: In animals that undergo indirect development, the
Q60: Babies who are nursed rather than fed
Q61: In blastulas, if cells from an area
Q63: The extraembryonic membrane that sends blood vessels
Q64: In a morula, the cells are still
Q65: Yolk sacs are found only in animals
Q66: The early divisions of the zygote are
Q67: Homeobox genes determine the overall shape of
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