| A | B |
| food chain | illustrates the relationship between prey and predator. Flow of energy |
| predator | kill and eat other organisms |
| prey | hunted and killed for food |
| decomposer | organism that causes decay |
| food web | a network of interconnected food chains in an ecosystem |
| limiting factors | environmental resources such as food, water, oxygen, light, and living space that control or limit populations |
| host | an organisms that harbors or nourishes another organism |
| biodiversity | the variety of species living within an ecosystem |
| community | all the different populations combined interacting together |
| secondary consumer | animals that eat herbivores |
| primary consumer | animals that eat plants or other primary producers. |
| mutualism | symbiotic association in which both partners benefit. |
| biomass | the dry weight of tissue and other organic matter found in a specific ecosystem |
| commensalisms | ecological interaction in which one species benefits and the other species is neither harmed nor helped |
| parasitism | type of predation in which the predator feeds on but usually does not kill a larger organism |