Question

${\mathrm{SO}}_2$ pollution is indicated by excessive growth of which the following?

• A. Algal Blooms
• B. Lichens
• C. Bryophytes
• D. Protozoa

Answer 1

The correct option is B

Lichens

The correct option is B.

The explanation for the correct option:

1. Lichens are a symbiotic association of algae and fungi.
2. ${\mathrm{SO}}_2$ pollution is indicated by excessive growth of Lichens.
3. The symbiotic relationship between the species of algae and fungi is represented by lichens.
4. These organisms mostly obtain their mineral nutrients from the air as opposed to the soil.
5. Therefore, any contamination would put their survival in danger.
6. Lichens will perish in an area where there is sulfur dioxide air pollution.
7. Because of this characteristic, lichens are seen as signs of air pollution.

Final answer: ${\mathrm{SO}}_2$ pollution is indicated by excessive growth of Lichens.