Identify the correctly matched pair/pairs of the germ layers and their derivatives.
A. Ectoderm-Epidermis
B. Endoderm-Dermis
C.Mesoderm-Muscles
D.Mesoderm-Notochord
E. Endoderm-Enamel of teeth

Options

A. A and D only
B. A and B only
C. A, C and D only
D. A, B , C and E only

Answer

To solve the question of identifying the correctly matched pairs of germ layers and their derivatives, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Option A: Ectoderm - Epidermis**
- The ectoderm is the outermost germ layer and it gives rise to the epidermis (the outer layer of skin).
- **Conclusion:** This pair is correctly matched.

2. **Option B: Endoderm - Dermis**
- The endoderm is the innermost germ layer and primarily forms the lining of the gut and associated organs. The dermis, however, is derived from the mesoderm, not the endoderm.
- **Conclusion:** This pair is incorrectly matched.

3. **Option C: Mesoderm - Muscles**
- The mesoderm is the middle germ layer and it is responsible for forming muscles, bones, and the circulatory system.
- **Conclusion:** This pair is correctly matched.

4. **Option D: Mesoderm - Notochord**
- The notochord is a rod-like structure that is also derived from the mesoderm. It plays a crucial role in the development of the vertebral column.
- **Conclusion:** This pair is correctly matched.

5. **Option E: Endoderm - Enamel of Teeth**
- The enamel of teeth is actually derived from the ectoderm, not the endoderm. The endoderm does not contribute to the formation of enamel.
- **Conclusion:** This pair is incorrectly matched.

### Final Answer:
The correctly matched pairs are:
- A. Ectoderm - Epidermis
- C. Mesoderm - Muscles
- D. Mesoderm - Notochord

Thus, the correct options are A, C, and D.

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