Gonads/testes develops from embryonic

Options

A. Ectoderm
B. Endoderm
C. Mesoderm
D. All of these

Answer

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about the embryonic layer from which the gonads or testes develop.

2. **Identify the Embryonic Layers**: There are three primary embryonic layers in human development:
- Ectoderm
- Mesoderm
- Endoderm

3. **Recognize the Function of Each Layer**:
- **Ectoderm**: This layer forms structures such as skin and the nervous system.
- **Endoderm**: This layer develops into internal organs like the digestive tract and respiratory system.
- **Mesoderm**: This layer is responsible for forming the muscles, bones, and the primary reproductive organs, including the testes.

4. **Determine the Correct Layer for Testis Development**: The testes, which are the male reproductive organs, develop from the mesoderm.

5. **Conclude the Answer**: Therefore, the correct answer to the question is that the gonads/testes develop from the **mesoderm**.

### Final Answer:
The gonads/testes develop from the **mesoderm**.

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