Question:
Which of the following is NOT an ectodermal derivative?
Which of the following is NOT an ectodermal derivative?
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Adrenal gland: cortex from mesoderm, medulla from ectoderm.
Updated On: Mar 6, 2026
- Stomodaeum
- Adrenal cortex
- Retina
- Enamel of teeth
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The Correct Option is B
Solution and Explanation
Step 1: Understanding germ layers.
During embryonic development, three germ layers are formed: ectoderm, mesoderm, and endoderm.
Step 2: Ectodermal derivatives.
Ectoderm gives rise to epidermis, nervous system, retina, enamel of teeth, and stomodaeum.
Step 3: Identifying mesodermal derivative.
Adrenal cortex develops from mesoderm, not ectoderm.
Step 4: Conclusion.
Adrenal cortex is not an ectodermal derivative.
During embryonic development, three germ layers are formed: ectoderm, mesoderm, and endoderm.
Step 2: Ectodermal derivatives.
Ectoderm gives rise to epidermis, nervous system, retina, enamel of teeth, and stomodaeum.
Step 3: Identifying mesodermal derivative.
Adrenal cortex develops from mesoderm, not ectoderm.
Step 4: Conclusion.
Adrenal cortex is not an ectodermal derivative.
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