| A | B |
|---|
| abiotic | not living factors in an organisms environment |
| biotic | living factors in a n orgnaisms environment |
| niche | role or position that an organism has in it's environment |
| habitat | area where an organism lives |
| community | group of interacting populations that live in the same geographic area |
| population | group of organisms of the same species that occupy the same geographic place |
| ecosystem | biological community and all the non living factors that affect it |
| biosphere | relatively thin layer of earth and it's atmosphere that supports life |
| biomass | total mass of living matter at each trophil level |
| organism | anything that has or once had all the characteristics of life |
| symbiosis | close mutualistic parasitic or commensal association between two or more species that live together |
| trophic levels | each step in a food chain or food web |
| ecological pyramids | diagram representing the anount of energy at each level |
| biodiversity | number of different species living in a specific area |
| homeostasis | regulation of an organisms internal environment to maintain conditions needed for life |
| reproductive success | the number of surviving offspring |
| physical and chemical defenses | the method or adaptions to avoid being eaten |
| ecology | scientific study of all the iterrelationships between organisms and their environment |
| predation | act of one organism feeding on another organism |
| autotroph | organism that captures energy from sunlight or inorganic substances to produce it's own food |
| heterotroph | organism that cant make it's food and gets its nutrients and energy requirements by feeding on other organisms |
| detritivore | organism that feeds on decomposing matter or detritus |
