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Which of the following is the pollution indicator plant?
1. Lichen
2. Moss
3. Algae
4. Fungus

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Correct Answer - Option 1 : Lichen

The Correct Answer is Lichen.

  • Mosses, the taxonomic division Bryophyta or the bryophytes, are small, non-vascular flowerless plants that typically form dense green clumps or mats, often in damp or shady locations.
  • Algae is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades.
  • A fungus is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms.

  • The damage symptoms in plants should preferably be studied in the local native species. Cultivated and introduced species should be avoided.
  • The species sensitive to pollutants should be first identified in the local flora and then used for pollution monitoring. Tolerant species should be identified and avoided in such work.
  • Damage symptoms for a particular pollutant should be studied in different species sensitive to that pollutant so that presence of the pollutant in the area may be cross-checked. For example, grey necrosis in Geranium, ivory necrosis in Zinnia, brown necrosis in Chrysanthemum, and reddish necrosis in Azalea indicate absolutely certain presence of SO2 pollution in the area. 

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