Triphasic life cycle is present in

Options

A. Red algae
B. Brown algae
C. Diatoms
D. Dinoflagellates

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the organism that exhibits a triphasic life cycle. We need to identify which of the given options has this characteristic.

2. **Defining Triphasic Life Cycle**: A triphasic life cycle involves three distinct phases: typically one gametophytic phase and two sporophytic phases. This means that there are two stages where the organism is diploid (sporophyte) and one stage where it is haploid (gametophyte).

3. **Analyzing the Options**:
- **Red Algae**: Known for having a triphasic life cycle, which includes one gametophyte phase and two sporophyte phases.
- **Brown Algae**: Generally exhibits a biphasic life cycle, with one gametophyte and one sporophyte phase.
- **Diatoms**: Primarily reproduce asexually and do not exhibit a triphasic life cycle.
- **Dinoflagellates**: Typically have a complex life cycle but do not fit the definition of a triphasic life cycle.

4. **Conclusion**: Based on the analysis, red algae (Rhodophyta) is the organism that exhibits a triphasic life cycle.

5. **Final Answer**: The triphasic life cycle is present in **Red Algae**.

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