Gemmule formation is a common mode of asexual reproduction in

Options

A. Paramecium
B. Hydra
C. sponges
D. yeast

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the organism in which gemmule formation is a common mode of asexual reproduction.

2. **Analyzing the Options**: The options provided are:
- A) Paramecium
- B) Hydra
- C) Sponges
- D) Yeast

3. **Identifying Gemmule Formation**: Gemmule formation is a specific type of asexual reproduction where a mass of cells (gemmules) is formed that can develop into a new organism. This process is particularly adapted for survival in harsh conditions.

4. **Evaluating Each Option**:
- **Paramecium**: This organism primarily reproduces through binary fission, not gemmule formation.
- **Hydra**: Hydra reproduces asexually through budding, not gemmule formation.
- **Sponges**: Sponges are known to reproduce asexually through gemmule formation, especially in freshwater species.
- **Yeast**: Yeast reproduces asexually through budding, not gemmule formation.

5. **Conclusion**: Based on the evaluation, the organism that commonly reproduces through gemmule formation is **C) Sponges**.