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| the scientific discipline in which the relationships among living organisms and the interaction the organisms have with their environments are studied. |
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| the portion of the Earth that supports life |
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| the living factors in an organism's environment |
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| the non-living factors in an organism's environment |
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| individual organisms of a single species that share the same geographic location at the same time make-up a population |
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| a group of interacting populations that occupy the same geographic area at the same time |
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| a biological community and all of the abiotic factors that affect it |
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| a large group of ecosystems that share the same climate and have similar types of communities |
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| place where an organism lives |
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| the role or position that an organism has in it's enviornment |
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| the act of one organism consuming another organism for food |
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| the close relationship that exists when two or more species live together |
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| relationship between two or more organisms that live closely together and benefit from each other |
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| relationship in which one organism benefits and the other organism is neither helped nor harmed |
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| a symbiotic relationship in which one organism benefits at the expense of another organism |
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| an organism that collects energy from sunlight or inorganic substances to produce food |
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| an organism that gets it's energy requirements by consuming other organisms |
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| a heterotroph that only eats plants |
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| hetertrophs that consume other hetertrophs for energy |
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| organisms that eat both plants and animals |
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| organisms that eat fragments of dead matter in an a ecosystem, return nutrients to the soil, air, and water where the nutrients can be reused by organisms. |
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| Each level in a food web or chain. Autotrophs 1st, heterotrophs = remaining levels |
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| a simple model that shows how energy flows through an ecosystem |
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| a model representing the many interconnected food chains and pathways in which energy flows through a group of organisms |
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| the total mass of living matter at each trophic level |
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| anything that takes up space and mass |
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| a chemical substance that an organism must obtain from it's environment to sustain life and undergo life processes |
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| cycles that involve living organisims, geological processes, and chemical processes |
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| the process of capture and conversion of nitrogen into a form that is usable by plants |
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| final step, soil bacteria convert fixed nitrogen compounds back into nitrogen gas, which returns it to the atmosphere |
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| shows relative amount of enerrgy availiable at each trophic level - Organisms use about 10%v of this energy for life. Body heat is a reason for loss |
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| reperesents the amoun of living organic matter at each trophic level. Typically the greatest biomass is at the base of the pyramid. |
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| Shows the relative number of individual organisms at each trophic level |
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| sunlight not needed, inorganic compounds (ex: hyrdrogen sulfide) |
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| What's the photosynthesis equation? |
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| CO2 + H2O ---> (sunlight)= Carbohydrates + O |
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| Levels of organizations are? |
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| organism -> population -> bio. comm. -> ecosystem -> biome -> biosphere |
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