Multiple Choice
A mad scientist decides to start combining embryos and see what develops. He takes bits from the blastula of a frog with blue skin and transplants them into the blastula of a yellow-skinned frog. The embryo develops blue cells in its brain and spinal cord. The scientist must have transplanted the cells into the:
A) ectoderm.
B) mesoderm.
C) endoderm.
D) allantois.
E) yolk sac.
Correct Answer:

Verified
Correct Answer:
Verified
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