| A | B |
|---|
| ecosystem | a community of organisms and their abiotic , or nonliving, environment |
| population | a group of organisms of the same species that live in a specific geographic area |
| consumer | an organism that eats other organisms or organic matter |
| parasitism | a relationship between two species the parasite, benefits from other species, the host, which is harmed |
| ecology | the study of the interactions of living organisms with one another and with their environment |
| community | all of the populations of species that live in the same habitat and interact with each other |
| predator | an organism that kills and eats all or part of another organism |
| abiotic factor | an environmental factor that is not associated with the activities of living organisms |
| producer | an organism that can make its own food by using energy from its surroundings |
| prey | an organism that is killed and eaten by another organism |
| biotic factor | an environmental factor that is associated with or results from the activities of living organisms |
| decomposer | an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients |
| food web | a diagram that shows the feeding relationships between organisms in the ecosystem |
