Select correct option w.r.t. heterogametes of algae. Cladophora, Chlamydomonas, Fucus, Ulothrix, Volvox, Chara, Spirogyra

Options

A. 5
B. 6
C. 2
D. 3

Answer

To solve the question regarding the heterogametes of the given algae, we will analyze each type of algae mentioned and determine whether they produce heterogametes or not.

### Step-by-Step Solution:

1. **Understanding Heterogametes**:
- Heterogametes are gametes that are different in size and morphology. Typically, male gametes are smaller and motile (flagellated), while female gametes are larger and non-motile.

2. **Analyzing Cladophora**:
- Cladophora produces isogametes, which are similar in appearance. Therefore, it is **homogametic**.

3. **Analyzing Chlamydomonas**:
- Chlamydomonas also produces isogametes, which are morphologically identical. Thus, it is **homogametic**.

4. **Analyzing Fucus**:
- Fucus produces heterogametes, where male and female gametes are different in size and morphology. Therefore, it is **heterogametic**.

5. **Analyzing Eulothrix**:
- Eulothrix produces isogametes, making it **homogametic**.

6. **Analyzing Volvox**:
- Volvox produces heterogametes, where the male and female gametes differ in size and morphology. Thus, it is **heterogametic**.

7. **Analyzing Chara**:
- Chara also produces heterogametes, with distinct male and female gametes. Hence, it is **heterogametic**.

8. **Analyzing Spirogyra**:
- Spirogyra produces isogametes, which are similar in appearance. Therefore, it is **homogametic**.

### Summary of Findings:
- **Heterogametic Algae**: Fucus, Volvox, Chara
- **Homogametic Algae**: Cladophora, Chlamydomonas, Eulothrix, Spirogyra

### Conclusion:
The correct options with respect to heterogametes of the mentioned algae are Fucus, Volvox, and Chara. Thus, the answer is that heterogametes are formed in **Fucus, Volvox, and Chara**.