Algal member with heterogametes

Options

A. Cladophora
B. Fucus
C. Spirogyra
D. Marchantia

Answer

**Step-by-Step Solution:**

1. **Understanding Heterogametes**:
- Heterogametes are defined as gametes that differ in size and/or function. Typically, one gamete is larger and non-motile (often the female), while the other is smaller and motile (often the male).

2. **Identifying the Options**:
- The options provided are:
- 1. Cledochora
- 2. Fucus
- 3. Pyrogloea
- 4. Marchantia

3. **Analyzing Each Option**:
- **Cledochora**: This genus does not exhibit heterogametes.
- **Fucus**: This brown alga is known to produce heterogametes. The male gamete is small and motile, while the female gamete is larger and non-motile.
- **Pyrogloea**: This genus does not show heterogametes.
- **Marchantia**: This is a liverwort and does not produce heterogametes.

4. **Conclusion**:
- Based on the analysis, Fucus is the only option that demonstrates the presence of heterogametes, making it the correct answer.

5. **Final Answer**:
- The algal member with heterogametes is **Fucus** (Option 2).

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