Which Statement About Gastrulation Is True

question 22

Multiple Choice

Which statement about gastrulation is true?

• A) In frogs, gastrulation begins in the vegetal hemisphere.
• B) In sea urchins, gastrulation produces the notochord.
• C) In birds, cells from the surface of the blastodisc move down through the primitive groove to form the hypoblast.
• D) In mammals, gastrulation occurs in the hypoblast.
• E) In sea urchins, gastrulation produces only two germ layers.

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