Which one of the following statement about lichens is wrong ?

Options

A. These grow very rapidly (2 cm per day)
B. They show fungal and algal symbiotic relationships
C. Some of its species are eaten is reindeers
D. These are pollution indicators

Answer

To determine which statement about lichens is wrong, let's analyze each option provided:

1. **They grow very rapidly, 2 cm per day.**
- This statement suggests that lichens have a rapid growth rate. However, lichens are known to grow very slowly, typically around 1 millimeter per day. Therefore, this statement is incorrect.

2. **They show fungal and algal symbiotic relationship.**
- This statement is true. Lichens are indeed a symbiotic relationship between fungi and algae (or cyanobacteria). The fungus provides structure and protection, while the algae provide food through photosynthesis.

3. **Some of its species are eaten by reindeers.**
- This statement is also true. Certain species of lichens are a food source for reindeer, especially during winter when other food sources are scarce.

4. **These are pollution indicators.**
- This statement is true as well. Lichens are sensitive to air pollution, particularly sulfur dioxide, and are often used as bioindicators of air quality.

Based on the analysis, the incorrect statement about lichens is:

**Answer: They grow very rapidly, 2 cm per day.**