In Bryophytes, antherozoids are

Options

A. Biflagellate
B. Multiflagellate
C. Sometimes biflagellate and sometimes multiflagellate
D. Biflagellate in a few species and multiflagellate in the rest

Answer

### Step-by-Step Solution:

1. **Understanding Bryophytes**:
- Bryophytes are non-vascular plants that include mosses, liverworts, and hornworts. They reproduce via spores and have distinct male and female gametes.

2. **Identifying Male Gametes**:
- In bryophytes, the male sex organs are called **antheridia**. These structures produce male gametes known as **antherozoids** (or spermatozoids).

3. **Structure of Antherozoids**:
- Antherozoids are the male gametes in bryophytes. They are produced from androgonial cells within the antheridia.

4. **Flagellation of Antherozoids**:
- Antherozoids are characterized by their flagella. Specifically, they are **biflagellate**, meaning they possess **two flagella** that aid in their movement, particularly in aquatic environments.

5. **Fertilization Process**:
- The antherozoids swim through water to reach the female gamete (archegonium) for fertilization. The presence of flagella is crucial for this movement.

6. **Evaluating Options**:
- The question provides several options regarding the nature of antherozoids:
- **Biflagellate**: Correct, as antherozoids have two flagella.
- **Multiflagellate**: Incorrect, as this implies more than two flagella.
- **Sometimes biflagellate and sometimes multiflagellate**: Incorrect, as this suggests variability that is not present in bryophytes.
- **Biflagellate in a few species and multiflagellate in the rest**: Incorrect, as most bryophytes have biflagellate antherozoids.

7. **Conclusion**:
- The correct answer is that in bryophytes, antherozoids are **biflagellate**.