Asexual reproduction takes place by zoospores or by aplanospores in

Options

A. Colletotrium
B. Saccharomyces
C. Rhizopus
D. Alternaria

Answer

To solve the question regarding which organism reproduces asexually by zoospores or aplanospores, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Zoospores and Aplanospores**:
- Zoospores are motile spores that can swim using flagella. They are primarily found in certain algae, fungi, and protozoans.
- Aplanospores, on the other hand, are non-motile spores that do not have flagella.

2. **Identifying Organisms in the Options**:
- **Option A: Colletotrichum** - This is a genus of fungi that typically reproduces asexually through conidia, not zoospores or aplanospores.
- **Option B: Saccharomyces** - This is a yeast that primarily reproduces asexually by budding, not by zoospores or aplanospores.
- **Option C: Rhizopus** - This is a genus of fungi that belongs to the group known as phycomycetes. It reproduces asexually through both zoospores and aplanospores.
- **Option D: Alternaria** - This is a genus of fungi that reproduces asexually through conidia, not zoospores or aplanospores.

3. **Conclusion**:
- Based on the characteristics of the organisms and their modes of reproduction, the correct answer is **Option C: Rhizopus**. This organism reproduces asexually by both zoospores and aplanospores.

### Final Answer:
**C: Rhizopus**