Biology Sec 2.1
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Created by:
abbigailsandmann on October 18, 2011
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16 terms
Terms | Definitions |
|---|---|
 Ecology | scientific study of all the interrelationships between organisms and their environment. |
| Ecologist | a person who specializes in biology. |
| Biosphere | relatively thin layer of Earth and its atmosphere that supports life. |
| Biotic factor | any living factor in an organism's environment. |
| Abiotic factor | any nonliving factor in an organisms environment, such as soil, water temperature, and light availability. |
| Population | group of organisms of the same species that occupy the same geographic place at the same time. |
| Biological community | all the interacting populations of different species that live in the same geographic location at the same time. |
| Ecosystem | biological community and all the nonliving factors that affect it. |
| Biome | large group of ecosystems that share the same climate and have similar types of communities. |
| Habitat | physical area in which an organism lives. |
| Niche | role, or position, of an organism in its environment. |
| Predation | act of one organism feeding on another organism. |
| Symbiosis | close mutualistic, parasitic, or commensal association between two or more species that live together. |
| Mutualism | symbiotic relationship in which both organisms benefit. |
| Commensalism | symbiotic relationship in which one organism benefits and the other organism is neither helped nor harmed. |
| Parasitism | symbiotic relationship in which one organism benefits at the expense of another organism. |
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