| A | B |
|---|
| adaptation | A characteristic of an organism that helps it to compete for resources. |
| camouflage | Patterns of body color that helps predators to sneak up on prey or helps prey to hide from predators. |
| carnivores | Consumers that eat herbivores and other animals. |
| community | All of the different populations of organisms living together in an environment. |
| competition | Organisms must fight for the limited resources (energy) in an ecosystem. |
| consumers | Organisms that must eat other organisms to get the energy they need. |
| decomposers | Consumers that get energy by breaking down the tissue of dead organisms. |
| ecosystem | A community and its physical environment. |
| energy pyramid | A diagram that shows the amount of energy available to pass from one level of the food chain to the next. |
| environment | surroundings |
| food chain | A diagram that shows the path of energy from one organism to the next. |
| food web | A diagram of multiple food chains in the same ecosystem. |
| habitat | Where a population lives in an ecosystem. |
| herbivores | Consumers that eat only plants. |
| host | An organism that is infected by a parasite. |
| individual | A single organism in an environment. |
| instinct | A behavior that an organism inherits that is usually shared by the entire population. |
| learned behavior | A behavior that is learned from an animal's parents or from experience. |
| limiting factor | A resource or environmental factor that limits the size of a population. |
| niche | The role of a population within its habitat. |
| omnivores | Consumers that eat plants and animals. |
| organism | An individual form of life (plant, animal, etc.) |
| parasite | An organism that must live on or inside another organism to get its energy. |
| parasitic relationship | A relationship between two different organisms that benefits one and hurts the other. |
| physical environment | The non-living parts of an environment (abiotic). |
| population | All of the individuals of the same kind living in the same environment. |
| predator | Organism that eats other organisms. |
| prey | An organism that is eaten by another organism. |
| primary consumers | Herbivores that eat only producers. |
| producers | Organisms that use photosynthesis to make the food they need. |
| secondary consumers | Carnivores that eat primary consumers. |
| symbiotic relationship | A relationship between two different kinds of organisms that benefits both organisms. |
| tertiary consumers | Carnivores that eat secondary consumers. |
