In Rhizopus, sexual fusion takes places between

Options

A. two coenogametangia
B. two gametes
C. two hyphae
D. two sporangia

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the process of sexual fusion in Rhizopus, specifically identifying the structures involved in this process.

2. **Identifying the Options**: The options provided are:
- 2 Sinogametangia
- 2 Gametes
- 2 Hyphae
- 2 Sporangia

3. **Defining Gametangia**: Gametangia are specialized organs or cells where gametes are formed. In fungi like Rhizopus, these structures are crucial for sexual reproduction.

4. **Understanding Sino-Gametangia**: In Rhizopus, the gametangium is referred to as sino-gametangium. This structure contains a dense cytoplasm and multiple nuclei, which are essential for the formation of gametes.

5. **The Fusion Process**: During sexual reproduction, the common wall between two sino-gametangia dissolves, allowing the gametes (sino-gametes) to fuse. This fusion results in a cell called the sinozygote.

6. **Plasmogamy and Karyogamy**: In the sinozygote, two processes occur:
- **Plasmogamy**: The fusion of the cytoplasm from the two gametangia.
- **Karyogamy**: The fusion of the nuclei from the gametangia.

7. **Formation of Zygospore**: The result of these fusions is the formation of a diploid cell known as the zygospore.

8. **Conclusion**: Therefore, in Rhizopus, sexual fusion takes place between **2 Sinogametangia**.

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