The process of fusion between male nucleus and egg nucleus is called as

Options

A. Syngamy
B. Double fertilization
C. Conjugation
D. Triple fusion.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes the fusion of the male nucleus (from the sperm) with the egg nucleus (from the ovum).

2. **Identifying Key Terms**:
- Male nucleus: This refers to the nucleus of the sperm, which is haploid.
- Egg nucleus: This refers to the nucleus of the egg (ovum), which is also haploid.
- Fusion: This indicates a process where two nuclei combine.

3. **Analyzing the Options**:
- **Syngamy**: This term refers specifically to the fusion of male and female gametes, resulting in the formation of a diploid zygote.
- **Double Fertilization**: This is a process that occurs in angiosperms where one sperm fertilizes the egg and another sperm fuses with the polar nuclei.
- **Conjugation**: This is a process related to bacteria where genetic material is exchanged between cells.
- **Triple Fusion**: This refers to the fusion of one male gamete with two polar nuclei, forming a triploid endosperm.

4. **Selecting the Correct Answer**:
- The correct answer is **syngamy**, as it specifically describes the fusion of the male nucleus and the egg nucleus.

5. **Conclusion**: The process of fusion between the male nucleus and the egg nucleus is called **syngamy**.

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