Algal member with diplontic life cycle is

Options

A. Spirogyra
B. Chara
C. Rock weed
D. Nostoc

Answer

To determine which algal member exhibits a diplontic life cycle, we can analyze the options provided:

1. **Understanding Diplontic Life Cycle**:
- In a diplontic life cycle, the organism remains diploid (2n) for most of its life cycle and only becomes haploid (n) during the formation of gametes. This means that the dominant phase of the organism is diploid.

2. **Analyzing the Options**:
- **Pyrovera**: This is a genus of algae that does not primarily exhibit a diplontic life cycle.
- **Chara**: This green algae typically has a haplontic life cycle, where the dominant phase is haploid.
- **Rockweed**: This is a brown alga (genus Fucus) that exhibits a diplontic life cycle, remaining diploid throughout most of its life and showing haploid characteristics only during gamete formation.
- **Nostoc**: This is a cyanobacterium that also does not exhibit a diplontic life cycle.

3. **Conclusion**:
- Based on the analysis, the algal member that shows a diplontic life cycle is **Rockweed**.

**Final Answer**: Rockweed

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