Which of the following plants has association with frankia

Options

A. Lentils
B. Alfalfa
C. Alnus
D. Sweet pea

Answer

To solve the question "Which of the following plants has association with Frankia?", we will analyze the options provided:

### Step 1: Understand the concept of plant associations
- Frankia is a genus of nitrogen-fixing bacteria that forms symbiotic relationships with certain non-leguminous plants. This relationship helps the plants to obtain nitrogen, which is essential for their growth.

### Step 2: Analyze the options given
1. **Lentils** - Lentils are leguminous plants that typically associate with Rhizobium bacteria for nitrogen fixation.
2. **Alfalfa** - Alfalfa is also a leguminous plant and, like lentils, associates with Rhizobium.
3. **Alnus** - Alnus, commonly known as alder, is a non-leguminous plant that forms a symbiotic relationship with Frankia.
4. **Sweet (possibly referring to Sweet Clover)** - Sweet Clover is another leguminous plant that associates with Rhizobium.

### Step 3: Identify the correct association
- Since we are looking for the plant that associates with Frankia, we can eliminate the leguminous plants (Lentils, Alfalfa, and Sweet Clover) because they do not associate with Frankia. The only plant that fits the criteria is **Alnus**.

### Conclusion
The plant that has an association with Frankia is **Alnus**.

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