Lichens grow at a very slow rate (1 mm per year). In how many years, a lichen matures?

1 - 4 years

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4 - 8 years

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100 years

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20 - 25 years

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Solution

The correct option is B 4 - 8 years
Lichens usually reach maturity and produce ascocarps at 4-8 years of age. The age of some lichens in alpine-arctic area is 1000-4500 years. Their longevity can be partially attributed to their ability to survive long periods of drought unharmed.
Thus, the correct answer is option B.

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