The structure produced by cleavage of a human zygote is called a(n) :
A) chorion.
B) blastocyst.
C) blastopore.
D) embryonic disc.
E) gastrula.
Correct Answer:
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Q21: Transplanting embryonic eye tissue into the back
Q22: If an embryo divides into three during
Q23: A developing human is considered an embryo
Q24: Based on experiments with amphibian embryos, Spemann
Q25: Induction refers to:
A)the pushing in of cells
Q27: The birth defect spina bifida results in
Q28: A human embryo is known as a
Q29: In humans, implantation occurs:
A)just prior to fertilization.
B)immediately
Q30: At what stage does a human embryo
Q31: Cells differentiate during development because:
A)each cell contains
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