Biological Classification Question 140
140. Organisms which are indicator of $SO_2$ pollution of air
(a) Mosses
(c) Mushrooms
(b) Lichens
(d) Puffballs
Show Answer
Answer : b
Hints & Solutions
(b) Lichens are composite organisms representing a symbiotic association between fungus and a algae. It can be crustose, foliose and fruticose types. They are the pioneer organisms in a new habitat. Lichens are used as indicator of air pollution. It does grow in the environment where pollution level is high, $SO_2$ is strong air pollutant and lichens are very sensitive to $SO_2$.
