Which of the Following Correctly Describes Gastrulation in Frog Embryos

question 60

Multiple Choice

Which of the following correctly describes gastrulation in frog embryos?

• A) causes the ectoderm and endoderm layers to invert
• B) occurs along the primitive streak in the animal hemisphere
• C) proceeds by involution as cells roll over the lip of the blastopore
• D) occurs within the inner cell mass that is embedded in the large amount of yolk

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