which of the following has dominant diploid generation and produces motile sperms?

Options

A. funaria
B. selaginella
C. marchantia
D. both (1) and (3)

Answer

To solve the question "Which of the following has a dominant diploid generation and produces motile sperms?", we will analyze the options provided based on their life cycles and reproductive structures.

### Step-by-Step Solution:

1. **Understanding Dominant Diploid Generation**:
- The term "dominant diploid generation" refers to the sporophyte stage in a plant's life cycle, which is diploid (2n). In this stage, the organism has two sets of chromosomes.

2. **Identifying the Types of Generations**:
- There are two main generations in plants: the sporophyte (diploid) and the gametophyte (haploid). In some plants, one generation is more dominant than the other.
- A **haplodiplontic** life cycle indicates that both haploid (gametophyte) and diploid (sporophyte) generations are present and can be prominent.

3. **Analyzing the Options**:
- **Funeria**: This plant exhibits a haplodiplontic life cycle, meaning both sporophyte and gametophyte generations are present but neither is particularly dominant. Thus, it does not fit the criteria of having a dominant diploid generation.

- **Selaginella**: This plant has a dominant sporophyte generation (diploid) and is known to produce motile sperm. Therefore, it meets both criteria of the question.

- **Marchantia**: This organism has a dominant gametophyte generation (haploid), which means it does not have a dominant diploid generation. Hence, it cannot be the correct answer.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Selaginella**, as it has a dominant diploid generation and produces motile sperms.

### Final Answer:
**Selaginella**