Anabaena is associated with Azolla's

Options

A. Stem
B. Leaves
C. Roots
D. Flowers

Answer

**Step-by-Step Solution:**

1. **Identify the Organisms:**
- Anabaena is a type of cyanobacteria known for its ability to fix nitrogen.
- Azolla is a small aquatic fern that often grows in rice paddies and has a symbiotic relationship with Anabaena.

2. **Understand the Relationship:**
- Anabaena forms a symbiotic relationship with Azolla. This means that both organisms benefit from each other.
- Anabaena provides fixed nitrogen to Azolla, which is essential for the fern's growth.
- In return, Azolla provides Anabaena with carbon compounds and a suitable environment for growth.

3. **Location of Association:**
- The symbiotic relationship occurs specifically in the cavities of the dorsal leaves of Azolla.
- These cavities provide a protected environment for Anabaena to thrive and carry out nitrogen fixation.

4. **Conclusion:**
- The association of Anabaena with Azolla occurs in the leaves of the fern, making "leaves" the correct answer to the question.

**Final Answer:**
Anabaena is associated with Azolla in the leaves.

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