What developmental landmark occurs at day 15?
A) primitive streak
B) neural tube
C) yolk sac
D) pharyngeal arches
E) somites
Correct Answer:
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Q10: The zygote is converted into the morula
Q11: Cells within the morula _.
A)are identical
B)are not
Q12: Implantation occur how many days after fertilization?
Q13: What term describes the implantation of the
Q14: A morula contains about how many cells?
Q16: Which phase comes immediately after cleavage?
A)fertilization
B)organ
Q17: Cleavage division convert the zygote into the
Q18: High levels of what hormone increases the
Q19: HCG targets which reproductive structure?
A)corpus luteum
B)placenta
C)uterus
D)ovary
E)blastocyst
Q20: HCG is secreted by the _.
A)blastocyst
B)ovary
C)hypothalamus
D)anterior
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