BIOINDICATORS

5. This aquatic plant indicates sewage and pollution in water.
7. The union that classifies bioindicators into three systems.
8. This plant, when abundant, indicates heavy metal pollution in water.
12. Aquatic organisms used to assess water pollution; often insects.
15. A substance often used in agriculture that can cause water pollution and be detected by bioindicators
16. A type of algae that lives in glass-like houses.
17. This lower plant is sensitive to sulfur dioxide in the air.
20. Sensitive insect larvae used to test water quality based on oxygen levels.

1. Macroinvertebrate that lives in sewage-polluted water.
2. Indicator organisms sensitive to both air and water pollutant.
3. A bioindicator group that includes bacteria, fungi, and viruses.
4. An annual weed used as an indicator of overgrazing.
6. A bioindicator animal that shows pollution by deformities or population changes.
9. Process where pollutants increase in concentration as they move up the food chain.
10. Microorganism used to detect toxins in water by emitting light.
11. The presence of this metal is indicated by horsetail plants.
13. gas that lichens are sensitive to.
14. Flatworms live in this type of water.
18. Higher plant bioindicator known to accumulate heavy metals like Lead and Cadmium.
19. An animal system indicator that breathes through its skin and is sensitive to environmental changes.