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) form the chorion.
B) lack the genes necessary to develop the embryo.
C) become the digestive tract.
D) induce the surrounding cells to differentiate.
E) become the neural tube.
D
Biology & Microbiology
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