Which pair exhibits zoidogamous type of fertilization ?

Options

A. Riccia & Pinus
B. Pteridium & Ginkgo
C. Pinus & Cedrus
D. Cycas & Ginkgo

Answer

To determine which pair exhibits zoidogamous type of fertilization, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Zoidogamous Fertilization**:
- Zoidogamous fertilization involves the movement of male gametes (antherozoids) that swim through water to reach the female gametes (archegonia). This type of fertilization is characteristic of certain groups of plants.

2. **Identifying Key Terms**:
- Male Gametes: Antherozoids (motile sperm).
- Female Gametes: Archegonia (structure where the egg is produced).

3. **Recognizing Plant Groups**:
- This type of fertilization is commonly found in certain plant groups such as algae, bryophytes, pteridophytes, and gymnosperms.

4. **Focusing on Gymnosperms**:
- Among gymnosperms, the genera Cycas and Ginkgo are known to exhibit zoidogamous fertilization. In these plants, the male gametes swim to the female gametes in water.

5. **Conclusion**:
- The correct answer to the question is the pair **Cycads (Cycas) and Ginkgo**. These plants exhibit zoidogamous fertilization due to the motility of their male gametes.

### Final Answer:
The pair that exhibits zoidogamous type of fertilization is **Cycads (Cycas) and Ginkgo**.

---