Male nucleus fuses with female nucleus during fertilization in Angiosperms as

Options

A. they possess two sets of different charges
B. they possess two sets of different genome
C. they are different in size and shape
D. hormones compel them to fuse

Answer

To solve the question "Male nucleus fuses with female nucleus during fertilization in Angiosperms as," we need to analyze the provided options and determine which one correctly explains the reason for the fusion of male and female nuclei during fertilization in angiosperms.

### Step-by-Step Solution:

1. **Understanding Fertilization in Angiosperms**:
- Fertilization in angiosperms involves the fusion of male and female gametes. The male gamete (pollen) delivers the male nucleus to the female gamete (ovule).

2. **Analyzing the Options**:
- **Option A**: They possess two sets of different charges.
- This option suggests that the male nucleus has a positive charge and the female nucleus has a negative charge, which facilitates their fusion. This is a plausible explanation for the attraction between the two nuclei.

- **Option B**: They possess two sets of different genome.
- This option is incorrect because while the male and female nuclei do have different genomes, this difference does not explain why they fuse. The fusion occurs before the genomes combine.

- **Option C**: They are different in size and shape.
- This option is also incorrect. Although the male and female nuclei may differ in size and shape, this characteristic does not compel them to fuse.

- **Option D**: Hormones compel them to fuse.
- This option is incorrect as well. Hormones may play a role after the fusion of gametes, but they do not cause the initial fusion of the nuclei.

3. **Conclusion**:
- After analyzing all the options, the most appropriate answer is **Option A**: "They possess two sets of different charges." This explains the reason for the fusion of male and female nuclei during fertilization in angiosperms.

### Final Answer:
The male nucleus fuses with the female nucleus during fertilization in angiosperms because they possess two sets of different charges.

---