Sperm head contains

Options

A. Mitochondria
B. Nucleus
C. Yolk
D. Centrosome

Answer

To answer the question "Sperm head contains," we can break down the information step by step:

### Step-by-Step Solution:

1. **Understanding the Structure of Sperm**:
- Sperm is composed of four main parts: the head, neck, middle piece, and tail. Each part has specific functions and components.

2. **Focusing on the Sperm Head**:
- The head of the sperm is the most anterior part and is crucial for fertilization. It has very little cytoplasm, which is important for its streamlined shape.

3. **Components of the Sperm Head**:
- The head contains an elongated haploid nucleus. This nucleus carries the genetic material (DNA) that will combine with the female gamete during fertilization.

4. **Acrosome**:
- The anterior portion of the sperm head is covered by a structure called the acrosome. The acrosome is filled with enzymes that are essential for penetrating the outer layers of the egg during fertilization.

5. **Eliminating Other Options**:
- **Mitochondria**: These are found in the middle piece of the sperm, not the head.
- **Yolk**: This is not present in sperm; it is found in oocytes (egg cells) as a nutrient source.
- **Centrosome**: This is located in the neck region of the sperm, not in the head.

6. **Conclusion**:
- Based on the analysis, the sperm head primarily contains the nucleus, which is essential for carrying genetic information.

### Final Answer:
- The sperm head contains **B, nucleus**.

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