A botanist discovers a new species of plant in a tropical rain forest. After observing its anatomy and life cycle, the following characteristics are noted: flagellated sperm, xylem with tracheids, separate gametophyte, and sporophyte generations with the sporophyte dominant and no seeds. Which group of plants is most closely related to this?

Explanation

To determine the group of plants most closely related to the newly discovered species based on the provided characteristics, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Key Characteristics**:
The characteristics noted by the botanist are:
- Flagellated sperm
- Xylem with tracheids
...