In the bryophytes, the gametophyte stage consists of first stage which is a_________

Explanation

**Step-by-Step Solution:**

1. **Understanding Bryophytes**: Begin by recognizing that bryophytes are a group of non-vascular plants that thrive in both aquatic and terrestrial environments. They are often referred to as amphibious plants.

2. **Identifying the Gametophyte Stage**: In the life cycle of bryophytes, the dominant stage is the gametophyte stage. This is crucial to understanding the structure of bryophytes.

3. **First Stage of Gametophyte**: The first stage of the gametophyte in bryophytes is known as the **primary protonema**. This stage is characterized by its filamentous structure.

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