Bacteria and Protists

3. a type of consumer bacteria that helps maintain nature's balance
9. chemicals that limit the growth of other bacteria
10. use the energy holding molecules of carbon dioxide together and release methane gas as a waste
12. an organism that uses oxygen when breaking down food
14. an organism that is adapted to living without oxygen
15. a plant-like protist
16. prevents bacterial diseases
17. poisonous substances produced by bacterial pathogens
18. changes nitrogen from the air into forms that plants and animals can use
19. the whip-like tails of bacteria that live in moist conditions

1. a thick-walled structure produced by bacteria
2. using organisms to help clean up or remove environmental pollutions
4. one or many celled organism that lives in moist or wet surroundings
5. living cells that carry all the processes of life
6. a process of heating food to a temperature that kills most bacteria but causes little change to the taste of food
7. any organism that causes disease
8. a process that produces two new cells with genetic material identical to each other and that of the original
11. make their own food using carbon dioxide, water, and energy from sunlight
13. the characteristics of both plants and animals