Testes descend into scrotum in mammals for

Options

A. Spermatogenesis
B. Fertilization
C. Development of sex organs
D. Development of visceral organs.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks why the testes descend into the scrotum in mammals.

2. **Identifying the Options**: The options provided are:
- A) Spermatogenesis
- B) Fertilization
- C) Development of sex organs
- D) Development of visceral organs

3. **Function of the Testes**: The primary function of the testes is to produce sperm. This process is known as spermatogenesis.

4. **Temperature Requirement**: Spermatogenesis requires a lower temperature than the normal body temperature for optimal sperm production.

5. **Role of the Scrotum**: The scrotum is a sac-like structure that holds the testes outside the body, providing the necessary cooler environment for sperm production.

6. **Evaluating the Options**:
- **Option A (Spermatogenesis)**: This is the correct answer as it directly relates to the function of the testes.
- **Option B (Fertilization)**: This is incorrect because fertilization refers to the union of male and female gametes, which does not require the testes to be in the scrotum.
- **Option C (Development of sex organs)**: This is also incorrect as the development of sex organs occurs earlier in life and is not the primary reason for the descent of the testes.
- **Option D (Development of visceral organs)**: This is not relevant to the function of the testes.

7. **Conclusion**: The correct answer is **Option A: Spermatogenesis**, as the descent of the testes into the scrotum is essential for the production of sperm at the required lower temperature.

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