From which primary germ layer do both the skeletal and muscular systems develop?
A) Ectoderm
B) Endoderm
C) Mesoderm
D) None of these choices are correct for both systems.
Correct Answer:
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Q31: Identical twins involve _ egg(s)and _ sperm.
A)two;two
B)one;one
C)two;one
D)one;two
Q32: A typical pregnancy test detects the presence
Q33: What important event does NOT occur in
Q34: From which primary germ layer does the
Q35: The pre-embryonic structure created by cleavage is
Q37: Gestation
A)is the time from fertilization to embryo
Q38: The fetus is surrounded by a protective
Q39: Embryonic development
A)refers to the first week.
B)refers to
Q40: The amnion
A)is the first site of blood
Q41: The placenta is composed of
A)chorionic villi.
B)uterine tissue.
C)fetal
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