The dominant part in the life cycle of protista and fungi is mostly-

Options

A. Haplontic
B. Diplontic
C. Haplodiplontic
D. Diplohaplontic

Answer

To answer the question regarding the dominant part in the life cycle of protista and fungi, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Life Cycles**:
- The life cycles of organisms can be categorized into different types based on the dominance of haploid or diploid phases. The main types are haplontic, diplontic, and haplodiplontic.

2. **Identifying the Phases**:
- In a haplontic life cycle, the dominant stage is haploid, meaning the organism spends most of its life in the haploid state.
- In a diplontic life cycle, the dominant stage is diploid, where the organism is primarily in the diploid state.
- A haplodiplontic life cycle has both haploid and diploid stages that are prominent.

3. **Analyzing Protista and Fungi**:
- Both protista and fungi exhibit a life cycle that is predominantly haploid. This means that the main phase of their life cycle is spent in the haploid state.
- In these organisms, the zygote (which is diploid) undergoes meiosis to produce haploid spores, which then develop into the adult organism.

4. **Conclusion**:
- Since both protista and fungi primarily exist in the haploid phase, the correct answer to the question is that the dominant part in their life cycle is **haplontic**.

### Final Answer:
The dominant part in the life cycle of protista and fungi is mostly **haplontic**.

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