The male gamete is Spirogyra is

Options

A. Motile but aflagellate
B. Motile and flagellate
C. Non-motile and flagellate
D. Multinucleate.

Answer

To determine the nature of the male gamete in Spirogyra, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**:
- Spirogyra is a filamentous green algae belonging to the phylum Chlorophyta. It is commonly found in freshwater environments.

2. **Understand the Structure**:
- Spirogyra has a unique structure characterized by spiral chloroplasts, which gives it its name. The filaments are unbranched and cylindrical.

3. **Reproductive Process**:
- Spirogyra reproduces sexually through a process called conjugation. This involves the fusion of gametes from two filaments.

4. **Types of Conjugation**:
- There are two types of conjugation in Spirogyra: lateral conjugation and scalariform conjugation. In both types, gametes are transferred between filaments.

5. **Male Gamete Characteristics**:
- During conjugation, the male gamete is produced in a male gametangium and is transferred to a female gametangium through a structure called the conjugation tube.

6. **Motility of Male Gamete**:
- The male gamete is motile, meaning it can move. However, it does not have to travel long distances since it moves through the conjugation tube.

7. **Flagella Presence**:
- Despite being motile, the male gamete in Spirogyra does not possess flagella. This means it is motile but not flagellate.

8. **Conclusion**:
- Based on the above points, the male gamete in Spirogyra is motile but not flagellate. Therefore, the correct answer to the question is that the male gamete is "motile but a flagellate."

### Final Answer:
The male gamete in Spirogyra is motile but not flagellate.

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