Question

what is lichens how does it survive​

Answer 1

Answer:

Lichens Need Clean Air Although lichens are tough and can survive in extreme climates, including extreme heat, cold and drought, they are sensitive to air pollution. Because lichens are so pollution-sensitive, some scientists use them to assess the air pollution coming from industrial plants and urban areas.

Explanation:

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Answer 2

ANSWER

Lichens do not have roots that absorb water and nutrients as plants do, but like plants, they produce their own nutrition by photosynthesis. When they grow on plants, they do not live as parasites, but instead use the plants as a substrate.

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