Ecology
Across
3. Several communities of organisms living in an area with similar environmental conditions
5. Organisms that change their internal conditions with the external environment
7. Several populations of organisms living together in an area
8. Feed only on plants
9. Living part of a habitat
13. Photosynthesis and cellular respiration make up this cycle
18. Broadest level of organization including all life on Earth
20. The study of the interactions between organisms and the living and nonliving parts of the
environment
21. Examples of decomposers
24. Break down dead organisms and recycle the organic molecules
25. includes precipitation, evaporation, and transpiration
29. Equals the gross primary productivity minus the respiration rate of producers
31. Process where certain bacteria change nitrogen gas into nitrates in the soil
33. The ability of an organism to adjust its tolerance level to abiotic factors
34. Water loss from the leaves of plants
35. Feed on both plants and animals
Down
1. The amount of energy available to the next trophic level in an energy pyramid
2. Single pathway of feeding relationships
4. A single living thing
6. Includes the pH, humidity, gases, salinity, sunlight, and soil in an area
7. Feed only on other animals
10. Cycle that occurs mainly through the soil, plants, and animal wastes
11. Process where nitrogen is returned to the atmosphere
12. An organism’s position in a sequence of energy transfers
14. A group of one species of organism living in an area
15. An organism’s total way of life
16. A long period of inactive where organisms survive unfavorable environmental conditions
17. Autotrophs that capture sunlight and use it to make organic molecules
19. Interconnected food chains in a community
22. The ability of organisms to survive within a limited range of environmental conditions
23. PRIMARY PRODUCTIVITY rate at which producers in an ecosystem carry on photosynthesis to make
carbohydrates
26. Bacteria that use inorganic substances instead of sunlight to make carbohydrates
27. Place where a plant or animal lives
28. Seasonal movement of animals to more favorable habitats
30. Organisms interacting with each other and their environment
32. Burning these has increased the amount of carbon dioxide in the atmosphere