Select the incorrect match.

Options

A. Asexual reproduction by fragmentation - Spirogyra
B. Asexual reproduction by spore formation - Rhizopus
C. Vegetative propagation by stem - Garlic
D. Sexual reproduction by gamete formation -Euglena

Answer

To solve the question of selecting the incorrect match, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand the Types of Reproduction**:
- Asexual reproduction involves a single organism reproducing without the fusion of gametes, while sexual reproduction involves the fusion of male and female gametes.

2. **Evaluate the First Option**:
- **Asexual reproduction by fragmentation in Spyrogyra**:
- Spyrogyra is known to reproduce asexually through fragmentation. This option is correct.

3. **Evaluate the Second Option**:
- **Asexual reproduction by spore formation in Rhizopus**:
- Rhizopus (a type of fungus) reproduces asexually through spore formation. This option is also correct.

4. **Evaluate the Third Option**:
- **Vegetative propagation in garlic**:
- Garlic reproduces asexually through vegetative propagation, specifically using its bulbs. This option is correct as well.

5. **Evaluate the Fourth Option**:
- **Sexual reproduction by gamete formation in Euglena**:
- Euglena primarily reproduces asexually through binary fission. While it can undergo sexual reproduction, it is not the primary mode. This option is incorrect.

6. **Conclusion**:
- The incorrect match is **Sexual reproduction by gamete formation in Euglena**. Therefore, the answer to the question is option D.

### Final Answer:
The incorrect match is **D: Sexual reproduction by gamete formation in Euglena**.