choose odd one w.r.t the role of mycobiont in lichen?

Options

A. Forms body structure and covering
B. Helps in anchorage
C. Fixes nitrogen
D. absorbs water and minerals

Answer

To solve the question "choose odd one with respect to the role of mycobiont in lichen," we will analyze each option regarding the role of mycobiont (the fungal component) in lichen.

### Step-by-Step Solution:

1. **Understanding Lichen**:
- Lichen is a symbiotic association between fungi (mycobiont) and algae or cyanobacteria (phycobiont).
- The mycobiont is responsible for various functions that support the lichen's survival.

2. **Analyzing the Options**:
- **A. Forms body surface and covering**:
- The mycobiont does form the body surface and provides a protective covering for the lichen. This is a correct role.

- **B. Helps in anchorage**:
- The mycobiont helps anchor the lichen to the substrate, which is also a correct role.

- **C. Fixes nitrogen**:
- This is generally not a role of the mycobiont. While some fungi can fix nitrogen, in the context of lichen, it is primarily the phycobiont (algae or cyanobacteria) that is responsible for nitrogen fixation.

- **D. Absorbs water and minerals**:
- The mycobiont does absorb water and minerals from the environment, which is a correct role.

3. **Identifying the Odd One Out**:
- From the analysis, options A, B, and D are correct roles of the mycobiont in lichen.
- Option C, which states "Fixes nitrogen," is the odd one out as it is not primarily the role of the mycobiont.

### Conclusion:
The odd one with respect to the role of mycobiont in lichen is **C. Fixes nitrogen**.

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