A human embryo is known as a fetus after weeks.
A) 12
B) 4
C) 8
D) 16
E) 2
Correct Answer:
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Q20: The metamorphosis of a caterpillar into a
Q21: In the 1920s, two German embryologists, Hans
Q22: During mammalian development, a
A) morula becomes gastrula.
B)
Q23: At what stage does a human embryo
Q24: At which stage is the human embryo
Q26: What will occur if a morula divides
Q27: Based on experiments with amphibian embryos, Spemann
Q28: In humans, implantation occurs
A) when the embryo
Q29: Induction refers to
A) the formation of the
Q30: Cells differentiate during development because
A) genes respond
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