The beginning of pregnancy is marked by:
A) ovulation.
B) fertilization.
C) implantation.
D) more than 24 weeks of gestation.
Correct Answer:
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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
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