At which stage is the human embryo most susceptible to toxic substances?
A) During organogenesis
B) During the last trimester
C) During cleavage
D) During the fourth and fifth months
E) Just before birth
Correct Answer:
Verified
Q23: Induction refers to
A) the migration of cells
Q24: What will occur if a morula divides
Q25: In the 1920s, two German embryologists, Hans
Q26: The umbilical cord of a mammal connects
Q27: In humans, fertilization occurs in the
A) uterus.
B)
Q29: At what stage does a human embryo
Q30: During mammalian development, a
A) morula becomes a
Q31: A developing human is considered an embryo
Q32: Transplanting embryonic eye tissue into the back
Q33: The structure produced by cleavage of a
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