Funaria requires water because

Options

A. fertilisation occurs in water only
B. Funaria is a hydrophyte
C. plants need water for gametogenesis
D. gametangia canot develop without water.

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism**: Funaria is a genus of mosses that belongs to the group known as bryophytes.

2. **Understand Bryophytes**: Bryophytes are often referred to as the amphibians of the plant kingdom because they require a moist environment to complete their life cycle.

3. **Reproductive Process**: The reproduction in bryophytes, including Funaria, involves both asexual and sexual reproduction. However, the sexual reproduction is particularly dependent on water.

4. **Fertilization Requirement**: In Funaria, the male plant releases sperm into the water. This sperm then swims through the water to reach the egg, which is located in the female reproductive structure.

5. **Conclusion**: Therefore, Funaria requires water primarily for the process of fertilization, as the sperm needs water to reach the egg for successful reproduction.

6. **Evaluate Options**:
- Option 1: "Fertilization occurs in water only." - This is correct.
- Option 2: "Funaria is a hydrophyte." - This is incorrect as Funaria is not a hydrophyte.
- Option 3: "Plants need water for gametogenesis." - This is misleading because while water is important for fertilization, it is not strictly necessary for gametogenesis.
- Option 4: "Gametangia cannot develop without water." - This is incorrect as gametangia can develop in moist conditions but do not require water to develop.

7. **Final Answer**: The correct answer is that Funaria requires water because fertilization occurs in water only.

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