Which of the following work as bio indicator of environmental pollution?
[A] Diatoms
[B] Coral Reefs
[C] Fishes
[D] Lichens
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Answer:
D [Lichens]
Notes:
Lichens are very sensitive to air pollution and water pollution. Areas with healthy lichen populations are lower in air pollution and water pollution. Lichens can thus be used as reliable biological indicators of pollution.
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