In Rhizopus, the gametangium is

Options

A. Unicellular
B. Multicellular
C. Multinucleate
D. Both (1) and (3)

Answer

To answer the question "In Rhizopus, the gametangium is," we need to analyze the options provided and understand the characteristics of the gametangium in Rhizopus.

### Step-by-Step Solution:

1. **Understanding Rhizopus**:
- Rhizopus is a genus of fungi, commonly known as black bread mold. It reproduces both sexually and asexually.

2. **Identifying Gametangium**:
- The gametangium is the structure that produces gametes. In Rhizopus, the gametangium is involved in sexual reproduction.

3. **Analyzing the Options**:
- **Option 1: Unicellular**:
- The gametangium in Rhizopus is indeed unicellular. This means that it consists of a single cell.
- **Option 2: Multicellular**:
- This option is incorrect because the gametangium is not multicellular; it does not consist of multiple cells.
- **Option 3: Multinucleate**:
- The gametangium can be multinucleate, meaning it can have more than one nucleus within a single cell.
- **Option 4: Both first and third**:
- Since the gametangium is unicellular and can also be multinucleate, this option is correct.

4. **Conclusion**:
- The correct answer is option 4: "Both first and third." The gametangium in Rhizopus is unicellular and can be multinucleate.

### Final Answer:
The gametangium in Rhizopus is both unicellular and multinucleate.

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