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Which one of the following is not true about lichens?

1. Their body is composed of both algal and fungal cells
2. Some form food for reindeers in arctic regions
3. Some species can be used as pollution indicators
4. These grow very fast at the rate of about 2 cm per year

Correct answer: These grow very fast at the rate of about 2 cm per year

Solution

Lichens are symbiotic associations of algae and fungi, and some are used as pollution indicators or as food for reindeer. They generally grow very slowly, so the claim that they grow about 2 cm per year is not true.

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