Multiple Choice
Which feature(s) characterize(s) gastrulation in both birds and frogs?
A) Establishment of three germ layers
B) Inward migration of ectoderm cells to form the gut
C) Formation of the neural tube from the hypoblast
D) Invagination of cells of the epiblast to form endoderm and mesoderm
E) Both a and c
Correct Answer:

Verified
Correct Answer:
Verified
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