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Environmental Issues. — BIO BOTANY STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12BIO BOTANYEnvironmental Issues.2 Marks
Question
What is meant by biological indicators? Give example.
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Answer

The plant species or plant community acts as a measure of environmental conditions, it is referred as biological indicators or phytoindicators or plant indicators.
E.g: Lichens as $SO _2$ pollution indicator.

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