Question

Lichens are indicators of pollution because ________

(a) They grow in oxygen depleted regions

(b) They don’t grow in polluted regions

(c) They grow in polluted regions

(d) Their growth indicates that the region has very high carbon levels

I had been asked this question by my school principal while I was bunking the class.

My question is from Biological Classification in section Biological Classification of Biology – Class 11

Answer 1

Right choice is (b) They don’t grow in polluted regions

To explain: The co-existence of algae with fungus is called lichens. Lichens are the best examples of symbiotic association. They are also good indicators of pollution as they don’t grow in polluted regions.