| A | B |
|---|
| commensalism | relationship where one organism benefits and other is unharmed |
| community | all living things in an area that depend on each other |
| emigration | movement of animals out of an area |
| energy pyramid | diagram that shows energy loss in a food chain |
| food chain | pathway of energy and materials |
| food web | many interconnected food chains |
| habitat | place where an animal or plant lives |
| immigration | movement of animals into an area |
| limiting factor | condition that keeps the population from growing bigger |
| niche | job of an organism in the community |
| parasitism | relationship where one organism benefits and other is harmed, like tick on a human |
| population | group of living things of same species in an area |
| predation | when one organism kills and eats another |
| mutualism | relationship where both organisms benefit |
| parasite | organism that lives on or in another organism |
| host | organism that has a parasite feeding off of it |
| predator | organism that kills another, the hunter |
| prey | organism that gets kills and eaten, the hunted |
| primary consumer | animal that eats only plants |
| secondary consumer | organism that eats other animals |
| increases | what happens to population size when birth rate is greater than death rate |
| decreases | what happens to population size when emigration is greater than immigration |
| decomposer | organism that gets its food from breaking down dead material |
| omnivore | animal that eats both plants and animals |
