Dizygotic twins result from the combination of
A) one egg cell and one sperm cell.
B) one egg cell and two sperm cells.
C) two egg cells and one sperm cell.
D) two egg cells and two sperm cells.
E) one trophoblast and two blastocysts.
Correct Answer:
Verified
Q1: The symptoms of fetal alcohol syndrome include
A)
Q2: Blood rich in oxygen and nutrients is
Q3: Muscle contractions of the uterine wall and
Q4: The foramen ovale is an opening that
Q6: During the early stages of pregnancy,the hormone
Q7: The external reproductive organs can be distinguished
Q8: Teratogens are substances that
A) stimulate embryonic growth.
B)
Q9: The fetal stage of development begins at
Q10: Development is a continuous process during which
Q11: The postnatal period extends from
A) the fertilized
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