Plasmogamy is the fusion of-

Options

A. 2 haploid cells including their nuclei
B. 2 haploid cells without nuclear fission
C. Sperm and egg
D. Sperm with 2 polar nuclei

Answer

**Step-by-Step Solution:**

1. **Understanding Plasmogamy**: Plasmogamy refers to the fusion of the cytoplasm of two cells. This is a critical step in sexual reproduction, particularly in fungi and some plants.

2. **Distinction Between Plasmogamy and Karyogamy**: It is important to differentiate between plasmogamy and karyogamy. While plasmogamy involves the fusion of the cytoplasm, karyogamy is the fusion of the nuclei of the two cells.

3. **Process of Sexual Reproduction**: In sexual reproduction, two gametes (haploid cells) come together. During this process, plasmogamy occurs first, where the cytoplasm of the two gametes fuses, but their nuclei remain separate initially.

4. **Final Outcome of Plasmogamy**: After plasmogamy, the next step is karyogamy, where the nuclei of the two gametes eventually fuse to form a diploid zygote. However, at the stage of plasmogamy, the nuclei have not yet fused.

5. **Conclusion**: Therefore, plasmogamy can be defined as the fusion of two haploid cells without their nuclei fusing. This is the correct interpretation of plasmogamy in the context of sexual reproduction.

**Answer**: Plasmogamy is the fusion of haploid cells without their nuclear fusion.

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