In the 1920s, two German embryologists, Hans Spemann and Hilde Mangold, demonstrated that a small patch of cells, called the dorsal lip of the blastopore, would
A) become the neural tube.
B) form the chorion.
C) become the digestive tract.
D) induce the surrounding cells to differentiate.
E) lack the genes necessary to develop the embryo.
Correct Answer:
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Q16: Which extraembryonic membrane lies immediately beneath the
Q17: What is differentiation?
A) The process in which
Q18: The cells that line the inside of
Q19: is the developmental event that results in
Q20: The metamorphosis of a caterpillar into a
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
Q25: A human embryo is known as a
Q26: What will occur if a morula divides
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