In which of the following organism, asexual reprodution occurs by zoospores?

Options

A. Yeast
B. Chlamydomonas
C. Penicillium
D. Hydra

Answer

To determine which organism reproduces asexually by zoospores, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Zoospores**:
- Zoospores are motile asexual spores that have flagella, allowing them to move. They are involved in the asexual reproduction of certain organisms.

2. **Evaluate the Options**:
- We need to analyze each of the given options to see if they reproduce using zoospores.

3. **Option 1: Yeast**:
- Yeast primarily reproduces asexually through budding, not zoospores. Therefore, this option is incorrect.

4. **Option 2: Chlamydomonas**:
- Chlamydomonas is a type of green algae that reproduces asexually by forming zoospores. This option is correct.

5. **Option 3: Spirogyra**:
- Spirogyra is also a green algae, and it reproduces asexually through fragmentation and not specifically through zoospores. Thus, this option is incorrect.

6. **Option 4: Hydra**:
- Hydra reproduces asexually through budding, similar to yeast. Therefore, this option is also incorrect.

7. **Conclusion**:
- The only organism from the options that reproduces asexually by zoospores is **Chlamydomonas**.

### Final Answer:
**Chlamydomonas** is the organism in which asexual reproduction occurs by zoospores.

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