alleryWhich organisms are suggested for comparing air quality on busy and quiet roads?
AEarthworms in soil
BLichens on tree trunks
CButterflies in fields
DMosses in the pond
Answer & Solution
Correct answer: B. Lichens on tree trunks
1. The paper gives an example of the comparative method.
2. Lichens are sensitive to air quality in some parts of the world.
3. One compares lichen floras on the same tree species on heavy-traffic and cleaner roads.
_Source: NCERT Position Paper Habitat and Learning, 3.6 Comparative Method_
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