Which statement is wrong about lichens

Options

A. Some species are eaten by Reindeers
B. Lichens are indicators of pollution
C. They grow rapidly about 2 cm per day
D. They have symbiotic relationship between alga and fungus.

Answer

**Step-by-Step Solution:**

1. **Understanding Lichens**: Lichens are complex organisms formed by a symbiotic relationship between fungi and algae (or cyanobacteria). They are known for their ability to survive in harsh environments.

2. **Evaluating the Statements**: We need to analyze each statement provided in the question to determine which one is incorrect:
- **Statement 1**: "Some species are eaten by reindeers."
- This statement is true. Lichens are a food source for reindeers and other animals.
- **Statement 2**: "Lichens are indicators of pollution."
- This statement is also true. Lichens are sensitive to air quality and can indicate levels of pollution, particularly sulfur dioxide.
- **Statement 3**: "They grow rapidly about 2 centimeters per day."
- This statement is incorrect. Lichens grow very slowly, typically at a rate of about 1 millimeter per day, not 2 centimeters.
- **Statement 4**: "They have a symbiotic relationship between alga and fungus."
- This statement is true. Lichens are indeed a symbiotic partnership between fungi and algae, with the fungus being the dominant partner.

3. **Identifying the Incorrect Statement**: Based on the analysis, the statement that is wrong about lichens is: "They grow rapidly about 2 centimeters per day."

4. **Conclusion**: The correct answer to the question is that the statement about lichens growing rapidly at a rate of 2 centimeters per day is incorrect.