Which of the following does NOT occur during the first trimester of pregnancy?
A) All of these events occur during the first trimester.
B) cleavage
C) gastrulation
D) organogenesis
E) sex determination
Correct Answer:
Verified
Q167: What becomes of the polar bodies formed
Q168: One of the important outcomes of gastrulation
Q169: The beginning of pregnancy is marked by:
A)ovulation.
B)fertilization.
C)implantation.
D)more
Q170: Fertilization by more than one sperm would
Q171: In which of the following structures does
Q173: A fertilized, diploid egg is called a(n):
A)gamete.
B)oocyte.
C)ootid.
D)zygote.
E)blastula.
Q174: Which of the following statements about gametogenesis
Q175: Developmentally, which tissue layer divides and produces
Q176: Gastrulation results in the formation of which
Q177: In humans, fertilization usually occurs in the:
A)vagina.
B)cervix.
C)uterus.
D)fallopian
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