Ecology Part I

6. consist of all the food chains in a single ecosystem.
7. _____ percent of energy stored as biomass in a trophic level is passed from one level to the next.
8. the variety of life on Earth at all its levels.
11. a food _____ outlines who eats whom.
13. organisms that break down dead or decaying organisms.
15. the natural environment of a plant, animal, or other organism is a _____.
16. a nonnative organism that begins to spread or expand its range and has the potential to cause harm to the environment.
18. the only living things on Earth that can make their own source of food energy.

1. when animals are exposed to the same stimuli repeatedly and stop responding to that stimulus.
2. a relationship between or among living things that compete for a limited resource.
3. an organism that depends on producers or other consumers for food, nutrition, and energy.
4. _____ diversity is the range of different inherited traits within a species.
5. a _____ species is a species that other organisms in an ecosystem largely depend on.
8. renewable energy from plants and animals.
9. contains biotic or living parts, as well as abiotic factors or nonliving parts.
10. _____ factors are living organisms that shape the environment.
12. _____ factors are non-living parts of an ecosystem that shape the environment.
14. carrying _____ is the maximum population size of a biological species that can be sustained by that environment.
17. an animal that is killed by another animal for food.