Male gametes are flagellated in

Options

A. Anabaena
B. Ectocarpus
C. Spirogyra
D. Polysiphonia

Answer

To solve the question "Male gametes are flagellated in," we will analyze the options provided and determine which one has flagellated male gametes.

### Step-by-Step Solution:

1. **Understanding the Options**:
The options given are:
- Anabina
- Ectocarpus
- Spirogyra
- Polysiphonia

2. **Analyzing Anabina**:
- Anabina is a type of cyanobacteria (blue-green algae).
- It reproduces asexually and does not have a sexual reproduction phase.
- **Conclusion**: Anabina does not have flagellated male gametes.

3. **Analyzing Ectocarpus**:
- Ectocarpus is a brown alga belonging to the class Phaeophyceae.
- In Ectocarpus, male gametes are flagellated and swim towards the female gametes during fertilization.
- **Conclusion**: Ectocarpus has flagellated male gametes.

4. **Analyzing Spirogyra**:
- Spirogyra is a green alga that reproduces through a process called conjugation.
- It does not produce flagellated gametes; instead, it forms gametes that move via amoeboid movement.
- **Conclusion**: Spirogyra does not have flagellated male gametes.

5. **Analyzing Polysiphonia**:
- Polysiphonia is a red alga belonging to the class Rhodophyceae.
- In Polysiphonia, the male gametes are non-motile and do not have flagella.
- **Conclusion**: Polysiphonia does not have flagellated male gametes.

6. **Final Conclusion**:
- After analyzing all the options, we find that the only organism with flagellated male gametes is **Ectocarpus**.

### Final Answer:
Male gametes are flagellated in **Ectocarpus**.

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