Question

Some plants are used as indicators of sulphur dioxide pollution in air.

• A. True
• B. False

Answer 1

The correct option is A True

Air pollution affects all living organisms including the producers of the food chain. Epiphytic lichens show clear signals of environmental quality stress, such as discoloration, necrosis, decreased photosynthetic efficiency and production of secondary metabolites. Hence, these are used as pollution indicators.