BIOINDICATORS

1. often used as bioindicators because they are very sensitive to pollution.
7. Useful indicators of environmental water quality because of their differential sensitivity to pollution.
8. are diverse group of organisms found in large quantities
9. Indicate the presence of gold in the soil
10. They are eligible to water quality assessment because of their nutrient requirements, rapid reproduction rate and very short life cycle.
13. Indicate or monitor the health of the environment
14. Is used as bioindicator to determine acute toxicity
16. Diatom have cell walls composed of transparent _____?
17. Abundance of ____ indicates sewage and heavy metal pollution of water
19. can live in extreme conditions, but they hate pollution
20. are algae that live in houses made of glass.

2. Amaranthus, Chenopodium, and Polygonum grow better in ___ areas
3. Live in slightly polluted water
4. Is the increasing concentration of a substance, such as a toxic chemicals.
5. Biomagnification is also known as?
6. It is the gradual accumulation of substances, such as pesticides, or other chemicals in an organism.
11. They are the first to be affected by degradation of the environment.
12. A bioindicator, a species ecologists monitor to help gauge how healthy an ecosystem is.
15. occurs through a chemical reaction that produces light energy within an organism's body.
18. stone flies, mayflies, and water pennies that require a high amount of dissolved oxygen are ____ insects.