Which of the following pteredophyric plane is known for replenishing soil ?

Options

A. Azolla
B. Lycopodium
C. Lycopodium
D. Marsilea

Answer

**Step-by-Step Solution:**

1. **Identify the Type of Plants:** The question is about pteridophytes, which are a group of vascular plants that reproduce via spores and do not produce seeds.

2. **Examine the Options:** The options provided are Azolla, Lycopodium, and Marsilea. We need to determine which of these plants is known for replenishing soil.

3. **Analyze Azolla:** Azolla is a pteridophyte that is particularly known for its role in nitrogen fixation. It has a symbiotic relationship with nitrogen-fixing bacteria, which allows it to convert atmospheric nitrogen into a form that plants can use. This process enriches the soil with nitrogen, making Azolla significant for soil replenishment.

4. **Consider Lycopodium:** Lycopodium is primarily known for its medicinal properties and does not have a significant role in soil replenishment. It is not typically associated with nitrogen fixation or enhancing soil fertility.

5. **Evaluate Marsilea:** Marsilea, also known as water clover, is an aquatic pteridophyte. While it may have some ecological benefits, it is not primarily known for replenishing soil in the same way that Azolla does.

6. **Conclusion:** Based on the analysis, Azolla is the pteridophyte known for replenishing soil due to its nitrogen-fixing capabilities.

**Final Answer:** Azolla is the pteridophyte known for replenishing soil.

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