Sporangia are found in fruiting structures called sporocarps in aquatic fems, which of the following is aquatic fern

Options

A. Azolla
B. Selaginella
C. Pteridium
D. Equisetum

Answer

To solve the question regarding which of the following is an aquatic fern, we can follow these steps:

### Step 1: Understand the Question
The question asks to identify an aquatic fern from the given options. We need to focus on the characteristics of each option to determine which one is aquatic.

### Step 2: Analyze the Options
The options provided are:
- A) Azolla
- B) Selaginella
- C) Pteridium
- D) Equisetum

### Step 3: Identify Aquatic Ferns
- **Azolla**: This is a small aquatic fern that floats on the surface of water bodies. It is known for its symbiotic relationship with cyanobacteria, which helps in nitrogen fixation.
- **Selaginella**: This is not an aquatic fern; it is a type of lycopod and typically found in terrestrial habitats.
- **Pteridium**: Commonly known as bracken fern, it is also not aquatic and grows in terrestrial environments.
- **Equisetum**: Known as horsetail, it is a genus of vascular plants that are primarily found in wet or marshy areas but are not classified as true aquatic ferns.

### Step 4: Conclusion
From the analysis, the only option that is an aquatic fern is **Azolla**.

### Final Answer
The correct answer is **A) Azolla**.

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