| A | B |
|---|
| abiotic | nonliving parts of the environment |
| autotroph | an organism that produces its own food; the source of energy for all other living things on earth |
| biodiversity | the variety of species in an area |
| biosphere | all of Earth's ecosystems, collectively; the biologically inhabited portions of Earth, including all of the water, land, and air in which organisms survive |
| biotic | the living parts of the environment |
| carnivore | an organism that survives by eating animals |
| carrying capacity | the largest population of any single species that an area can support |
| community | a combination of all the different populations that live and interact in the same environment |
| competition | the struggle between organisms for the same limited resources in a particular area |
| consumer | an organism that obtains its energy from producers |
