Motile, flagellated antherozoids are found in `:`

Options

A. Anthoceros
B. Pinus
C. Selaginella
D. Both ( 1) and ( 3)

Answer

To solve the question "Motile, flagellated antherozoids are found in:", we need to analyze the options provided and understand the characteristics of antherozoids.

### Step-by-step Solution:

1. **Understanding Antherozoids**:
- Antherozoids are male gametes in plants, specifically in non-flowering plants. They are motile and flagellated, which means they have tails that allow them to swim.

2. **Identifying the Types of Plants**:
- Antherozoids are typically found in bryophytes (like mosses and liverworts) and some pteridophytes (like ferns).

3. **Analyzing Each Option**:
- **Option 1: Anthoceros**:
- Anthoceros is a type of bryophyte (hornwort). Since bryophytes produce motile antherozoids, this option is correct.

- **Option 2: Pinus**:
- Pinus is a gymnosperm. Gymnosperms do not produce motile antherozoids; instead, they produce non-motile male gametes (pollen grains). Therefore, this option is incorrect.

- **Option 3: Selaginella**:
- Selaginella is a genus of pteridophytes (spike moss). It also produces motile flagellated antherozoids, making this option correct.

- **Option 4: Both 1 and 3**:
- Since both Anthoceros and Selaginella have motile flagellated antherozoids, this option is correct.

4. **Conclusion**:
- The correct answer to the question is **both 1 and 3** (Anthoceros and Selaginella).

### Final Answer:
Motile, flagellated antherozoids are found in **both Anthoceros and Selaginella**.

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