Multiple choice

Which of the following options is a dangerous aspect of lichens?

  1. Lichens are used for dye preparation.

  2. Lichens are used as nitrogen fixers.

  3. Lichens are used as indicators of pollution.

  4. Lichens accumulate minerals and radioactive derivatives.

  5. Lichens are soil-forming organisms.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lichens accumulate harmless minerals as well as radioactive derivatives of strontium and cesium, which are retained in high concentration. These isotopes get ingested by the animals feeding on it. When these animals are eaten by humans, it may reach at a dangerous level.

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