The life-cycle of a Brown alga (Rockweed) is

Options

A. Diplontic life- cycle
B. Diplohaplontic life- Cycle
C. Haplontic life- cycle
D. Haplo diplontic life- cycle

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about the life cycle of a brown alga known as Rockweed, which belongs to the genus Fucus.

2. **Understand Life Cycle Types**: There are different types of life cycles in organisms, primarily:
- Haplomantic Life Cycle: Dominated by haploid gametophytes.
- Diplomatic Life Cycle: Dominated by diploid sporophytes.
- Haplodiplomantic Life Cycle: Alternation between haploid gametophytes and diploid sporophytes.
- Diplohaplomantic Life Cycle: Alternation between diploid gametophytes and haploid sporophytes.

3. **Analyze the Life Cycle of Fucus**:
- Fucus (Rockweed) exhibits a Diplomatic life cycle. In this cycle, the majority of the organism's life is spent in the diploid sporophyte stage (2n condition).

4. **Conclusion**: Based on the analysis, the life cycle of brown algae (Fucus) is classified as a Diplomatic life cycle.

5. **Select the Correct Option**: The correct answer to the question is option a: Diplomatic life cycle.

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