PDF chapter test TRY NOW
Choose the correct option:
| environment | bioindicator | quality |
| acid | soil | sulphur dioxide |
| crusty | pollution | roots |
| symbiotic | cyanobacteria | bioindicators |
| Industrialisation | leafy | Lichen |
| air | extinction | chlorophyll |
| atmosphere | environments | health |
1. Lichens acts as an indicator of the concentration of in atmosphere. This causes rain.
2. is a composite organism that comprises an alga or cyanobacteria and a fungus that live together in a association.
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