| A | B |
|---|
| biosphere | part of Earth that supports life |
| carrying capacity | largest number of individuals of a species that an ecosystem can support over time |
| commensalism | symbiotic relationship in which one organism benefits and the other organism is not affected |
| community | all the populations of different species that live in an ecosystem |
| consumer | organism that cannot create its own food |
| ecology | study of interactions that take place mong organisms and their environment |
| ecosystem | all the living organisms in an area and the nonliving features of their environment |
| habitat | place where an organism lives and that provides resources needed for survival |
| limiting factor | anything that can restrict the size of a population |
| mutualism | symbolic relationship in which both organisms benefit |
| niche | unique ways an organism survives, obtains food, shelter, and avoids danger |
| parasitism | one organism benefits and the other organism is harmed |
| population | organisms that belong to the same species living in a community |
| producer | organism that uses an outside source of energy to create food molecules |
| symbiosis | any close relationship between species |
