1. consumers eat primary consumers.
2. consumers eat producers.
3. animals are active during the day.
4. eat both meat and plants.
5. eat dead organisms which they did not kill.
6. eat only meat.
7. organisms are active at night
8. rhythms occur one a year (flowering, hibernation, estivation).
9. are decay organisms that break down dead tissue.
10. benefits both organisms (example: termites and protozoans, also cleaner shrimp and fish)
11. is a close relationship between two organisms of different species that benefits at least one of them.
12. is the conversion of ammonia to nitrates.
13. is the conversion of pure nitrogen into nitrates by bacteria in roots of legumes.
14. will benefit one organism while the other is neither helped nor harmed (example: cattle egrets and cattle).
15. factors are living things.
16. A is a group of individuals of one species that exist in a common area and share resources.
17. A(n) is a physically distinct, self-supporting unit of interacting organisms and their surrounding environment.
18. An organism's way of life is called its .
19. Animals breathe in oxygen and release carbon dioxide in a process called .
20. Animals that kill others for food are called .
21. Another word for consumers is .
22. Another word for producers is .
23. Circadian rhythms occur every hours.
24. Competing with different species is called competition.
25. Competing within the same species is called competition.
26. Condensation, evaporation, and transpiration are all part of the cycle.
27. Ecological pyramids may be used to show either or numbers.
28. Factors such as light, water, soil, wind, temperature, and nutrients are called abiotic factors.
29. Herbivores eat only .
30. Inter-related food chains are called food .
31. Organisms that can manufacture their own food are called .
32. Organisms that must eat other organisms for food are called .
33. Tertiary consumers eat consumers.
34. The is made up of all the populations of the area.
35. The is the area of the earth's surface where life exists.
36. The animals that are killed by the predators are called the .
37. The change of liquid water to water vapor in the atmosphere is called .
38. The change of water vapor into liquid water is called .
39. The conversion of nitrogen compounds into nitrogen gas is called .
40. The conversion of nitrogen compounds to ammonia is called .