Lichens are widely used as environmental indicators or bio-indicators. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. Therefore the answer is the air quality is good because of no lichens present
Answer:
the state of having normal physical functions suspended or slowed down for a period of time; deep sleep.
more explanation:
Dormancy is a period in an organism's life cycle when growth, development, and (in animals) physical activity are temporarily stopped. This minimizes metabolic activity and therefore helps an organism to conserve energy. Dormancy tends to be closely associated with environmental conditions.
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Increased susceptibility to infection". HIV/AIDs is an immune deficiency disease that does the exact same thing.</span>
More organisms are born than can survive.