Which of the following taxa shows zooidogamous oogamy
(I) Spirogyra (II) Funaria
(III) Pteris (IV) Cycas
The correct answer is

Options

A. i, ii, iii
B. ii, iii, iv
C. i, iii, iv
D. i, ii, iv.

Answer

To determine which of the given taxa shows zooidogamous oogamy, we need to analyze each option based on the definition of zooidogamous oogamy. Zooidogamous oogamy is a type of sexual reproduction where motile sperm (flagellated antherozoids) swim to the egg for fertilization.

### Step-by-Step Solution:

1. **Understanding Zooidogamous Oogamy**:
- Zooidogamous oogamy involves the fusion of motile sperm (flagellated) with a non-motile egg. This is a characteristic of certain groups of plants.

2. **Analyzing Each Taxon**:
- **(I) Spirogyra**:
- Spirogyra is a green alga that reproduces sexually through conjugation, not through zooidogamous oogamy. Therefore, it does not fit the criteria.
- **(II) Funaria**:
- Funaria is a moss. Mosses typically reproduce through sperm that swim to the egg, which is a characteristic of zooidogamous oogamy. Thus, Funaria does show zooidogamous oogamy.
- **(III) Pteris**:
- Pteris is a fern. Ferns reproduce via spores and do not exhibit zooidogamous oogamy. Hence, it does not fit the criteria.
- **(IV) Cycas**:
- Cycas is a gymnosperm. In Cycas, the male gametes are non-motile, and fertilization does not involve swimming sperm, so it does not show zooidogamous oogamy.

3. **Conclusion**:
- Based on the analysis, the only taxon that shows zooidogamous oogamy is **(II) Funaria**.

### Final Answer:
The correct answer is **(II) Funaria**.