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ch.18-1 18-3
| Question | Answer |
|---|---|
| organism | a single living thing |
| population | a group of the same living thing. |
| community | a group of different organisms in one given enviornment |
| ecosystem | abiotic factocs and biotic factors + all community |
| biosphere | the parts of earth where there is life. the biosphere includes 4 miles off earths surface and 6 miles into the lithosphere |
| niche | role that an organism plays in an ecosystem. |
| symbiosis | a close LONG TERM relationship shared by two or more organisms. |
| mutualism | when BOTH organisms benefit |
| commensalism | when ONE organism benifits and the other is not affected nor harmed. |
| parasitism | one organism benifits and the other is harmed. organism that benifits is called a parasite |
| defensive chemicals | animals that defend themselves with chemicals. (ex. bees wavps) |
| warning coloration | the animals with chemical defense warn predators by turning bright colors |
| the three different groups of symbiosis | mutualism,commensalism,parasitism |
| ecology | an area of science that focuses on the study of the interaction between two or more organisms |