Select the incorrect statement form the following .

Options

A. One of the major components of cell wall of most fungi is chitin .
B. Lichen is a composite organism formed from the symbiotic association of an algae and a plasmodium .
C. Yeast used in making bread and beer is a fungus .
D. Mycorrhizae is symbiotic relationship between fungi and roots of some higher plants

Answer

To solve the question, we need to analyze each statement provided and identify which one is incorrect.

### Step-by-Step Solution:

1. **Statement 1**: "One of the major components of the cell wall of most fungi is chitin."
- **Analysis**: This statement is correct. Chitin is indeed a primary component of the cell walls of fungi, providing structural support.

2. **Statement 2**: "Lichen is a composite organism formed from the symbiotic association of an alga and plasmodium."
- **Analysis**: This statement is incorrect. Lichens are formed from the symbiotic association of an alga and a fungus, not plasmodium. Plasmodium is a genus of parasites that cause malaria and is not involved in the formation of lichens.

3. **Statement 3**: "Yeast used in making bread and beer is a fungus."
- **Analysis**: This statement is correct. Yeast, particularly Saccharomyces cerevisiae, is a unicellular fungus used in fermentation processes for making bread and beer.

4. **Statement 4**: "Mycorrhiza is a symbiotic relationship between fungi and roots of some higher plants."
- **Analysis**: This statement is correct. Mycorrhiza refers to the symbiotic association between fungi and the roots of higher plants, which enhances nutrient uptake for the plants.

### Conclusion:
The incorrect statement is **Statement 2**: "Lichen is a composite organism formed from the symbiotic association of an alga and plasmodium."