Which Feature(s)characterize(s)gastrulation in Both Birds and Frogs

question 21

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

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