Association between mycobiont and phycobiont are found in , 1.mycorrhiza, 2. root, 3.lichens , 4. BGA

Options

A. mycorrhiza
B. root
C. lichens
D. BGA.

Explanation

To solve the question regarding the association between mycobiont and phycobiont, we can follow these steps:

### Step 1: Understand the Terms
- **Mycobiont** refers to the fungal component in a symbiotic relationship.
- **Phycobiont** refers to the algal component in the same relationship.

### Step 2: Identify the Associations
- Mycorrhiza is a symbiotic association between fungi and plant roots, not specifically involving algae.
- Roots themselves do not represent an association between mycobiont and phycobiont.
- Lichens are a well-known symbiotic association between fungi (mycobiont) and algae (phycobiont).
- Blue-green algae (BGA) are a type of cyanobacteria, which do not form a direct association termed mycobiont and phycobiont.

### Step 3: Analyze the Options
1. **Mycorrhiza** - Involves fungi and plant roots, not algae.
2. **Root** - Does not involve any association with fungi and algae.
3. **Lichens** - This is the correct association between mycobiont (fungus) and phycobiont (alga).
4. **BGA** - Refers to blue-green algae, which does not fit the mycobiont/phycobiont classification.

### Step 4: Conclusion
Based on the analysis, the correct answer is **3. Lichens**.

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