Endoskeleton is secreted by?
Correct answer: C. Mesoderm.
- A. Ectoderm.
- B. Endoderm.
- C. Mesoderm.
- D. All of these
Explanation
The endoskeleton develops mainly from mesoderm, the embryonic germ layer that gives rise to connective tissues, cartilage and bone. The likely distractor is ectoderm, which forms structures such as the epidermis and nervous system rather than the internal skeleton.
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