In a Frog Embryo, Gastrulation

question 58

Multiple Choice

In a frog embryo, gastrulation

• A) produces a blastocoel displaced into the animal hemisphere.
• B) occurs along the primitive streak in the animal hemisphere.
• C) is impossible because of the large amount of yolk in the ovum.
• D) proceeds by involution as cells roll over the lip of the blastopore.
• E) occurs within the inner cell mass that is embedded in the large amount of yolk.

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