| A | B |
|---|
| mutualism | a symbiotic relationship in which both organisms benefit |
| oil | the major contributor to marine habitat loss |
| parasitism | a symbiotic relationship in which one organism benefits and the other is harmed |
| prey | organism eaten by a predator |
| producers | the bottom level of an energy pyramid |
| symbiosis | living together in a long time association between two or more species |
| limiting factors | resources such as water, food, and sunlight when the size of the population is close to the carrying capacity |
| competition | two organisms trying to use the same resource |
| reuse, recycle, reduce | the 3 R's of conservation |
| carbon dioxide | an increase in this and other pollutants is causing global temperatures to rise |
| predator and prey | the relationship between a cat and a rat |
| herbivores | organisms that eat plants |
| carnivores | organisms that eat meat |
| omnivores | organisms that eat both plants and animals |
| scavenger | an animal that feeds on the bodies of dead animals |
| bury it | the only safe way to dispose of hazardous waste |
| algae | the most abundant producer on earth |
| sun | the source of energy for all living things |
| adaptations | characteristics that help an organism survive and reproduce in the environment |
| commensalism | a symbiotic relationship in which one organism benefits and the other is unaffected |
