Bacteria and Protists

2. chemicals that limit the growth of other bacteria
4. a thick-walled structure produced by bacteria
6. changes nitrogen from the air into forms that plants and animals can use
9. prevents bacterial diseases
12. one or many celled organism that lives in moist or wet surroundings
13. the whip-like tails of bacteria that live in moist conditions
14. use the energy holding molecules of carbon dioxide together and release methane gas as a waste
15. sphere-shaped bacteria
17. make their own food using carbon dioxide, water, and energy from sunlight
18. poisonous substances produced by bacterial pathogens

1. using organisms to help clean up or remove environmental pollutions
3. a type of consumer bacteria that helps maintain nature's balance
5. living cells that carry all the processes of life
7. an organism that uses oxygen when breaking down food
8. an organism that is adapted to living without oxygen
10. a plant-like protist
11. the characteristics of both plants and animals
12. any organism that causes disease
13. a process that produces two new cells with genetic material identical to each other and that of the original
16. a process of heating food to a temperature that kills most bacteria but causes little change to the taste of food