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Which of the following statements is correct?

1. Lichens are not good pollution indicators.
2. Lichens do not grow in polluted areas.
3. Algal component of lichens is called mycobiont.
4. Fungal component of lichens is called phycobiont.

Correct answer: Lichens do not grow in polluted areas.

Solution

Lichens are highly sensitive to air pollution, especially sulfur dioxide and other contaminants, so they often fail to grow in polluted areas. This makes them useful pollution indicators, and the fungal and algal partners have the opposite names from those listed.

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