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 can follow these steps:

### Step-by-Step Solution:

1. **Understand the Term "Antherozoids":**
- Antherozoids are the male gametes in plants, equivalent to sperm in animals. They are motile and flagellated.

2. **Identify Where Antherozoids are Found:**
- Antherozoids are primarily found in bryophytes (a group of non-vascular plants that includes mosses, liverworts, and hornworts).

3. **Production of Antherozoids:**
- Antherozoids are produced in an organ called the antheridium, which is the male reproductive structure in bryophytes.

4. **Characteristics of Antherozoids:**
- Antherozoids are motile, meaning they can move, and they have flagella, which are tail-like structures that aid in swimming.

5. **Role of Water:**
- The presence of water is crucial for the movement of antherozoids, as they swim through water to reach the female reproductive organs for fertilization.

6. **Examples of Plants with Antherozoids:**
- An example of a bryophyte that has antherozoids is Anthoceros.
- Additionally, Selaginella is a pteridophyte (a type of vascular plant) that also produces antherozoids.

7. **Conclusion:**
- Therefore, the correct answer to the question is that motile, flagellated antherozoids are found in both Anthoceros (a bryophyte) and Selaginella (a pteridophyte).

### Final Answer:
The correct answer is: Both Anthoceros and Selaginella.

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