Within the human embryo, activity related to the development of hair and nails is centered in the ____________?
Correct answer: D. ectoderm
- A. mesoderm
- B. endoderm
- C. exoderm
- D. ectoderm
Explanation
Hair and nails develop from the ectoderm, the embryonic layer that also contributes to the skin and nervous system. Mesoderm forms structures such as muscle and bone, while endoderm contributes mainly to internal organs.
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