In Selaginella gametophyte is dominant generation .

Answer

**Step-by-Step Solution:**

1. **Understanding Generations in Selaginella:**
- In the life cycle of Selaginella, there are two main generations: the gametophyte and the sporophyte. The gametophyte is the haploid (1N) generation that produces gametes, while the sporophyte is the diploid (2N) generation that produces spores.

2. **Identifying the Dominant Generation:**
- The statement claims that the gametophyte is the dominant generation in Selaginella. However, it is essential to clarify what "dominant" means in this context. The dominant generation is typically the one that is more prominent or longer-lived in the life cycle.

3. **Analyzing the Gametophyte:**
- The gametophyte in Selaginella is indeed short-lived and dissolves quickly after producing gametes. It is responsible for producing male and female gametes, which are necessary for fertilization.

4. **Analyzing the Sporophyte:**
- The sporophyte generation is the main structure of the Selaginella plant. It is more prominent, longer-lived, and includes structures such as the strobilus, which produces sporangia. The sporophyte generation is responsible for the production of spores, which can grow into new gametophytes.

5. **Conclusion:**
- Based on the analysis, the statement that "in Selaginella, the gametophyte is the dominant generation" is false. The sporophyte generation is the dominant one in terms of structure and longevity.

**Final Answer:**
In Selaginella, the dominant generation is the sporophyte, not the gametophyte.

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