Zoidiogamy is found in

Options

A. Algae
B. Bryophytes and Pteridophytes
C. A few gymnosperms
D. All the above .

Answer

**Step-by-Step Solution:**

1. **Understanding Zoidiogamy**:
- Zoidiogamy is a type of sexual reproduction found in certain plants where the male gametes are motile and swim to reach the female gametes.

2. **Identifying the Organisms**:
- The question provides four options:
- Algae
- Bryophytes and Pteridophytes
- A few Gymnosperms
- All of the above

3. **Analyzing Each Option**:
- **Algae**: This group commonly exhibits zoidiogamy as the male gametes swim in water to fertilize the female gametes.
- **Bryophytes and Pteridophytes**: Both of these groups also show zoidiogamy, where the male gametes swim to the female gametes for fertilization.
- **Gymnosperms**: Some gymnosperms, such as Cycas, also exhibit this form of reproduction, where motile male gametes swim to the female gametes.

4. **Conclusion**:
- Since zoidiogamy is found in algae, bryophytes, pteridophytes, and some gymnosperms, the correct answer is "All of the above".

**Final Answer**: Zoidiogamy is found in all of the above (algae, bryophytes, pteridophytes, and a few gymnosperms).

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