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flahcards 1
bio
| Question | Answer |
|---|---|
| ecology | scientific study of interactions among organisms and between organisms and thei enviroment |
| biosphere | part of earth in which life exists including land, water,and air or atmosphere |
| species | group of similar organisms that can breed and produce fertile offspring |
| population | group of individuals of the same species that live in the same area |
| community | assemblage of differnt populations that live together in a defined area |
| ecosystem | collection of all the organisms that live in collection of all the organisms that live in a particular place, togeher with their nonliving enviroment |
| autotroph | organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds;also called producer |
| heterotroph | organism that obtains energy from the foods it consumes;also called a consumer |
| food web | network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem |
| trophic level | step in a food chain or food web |
| biomass | total amount of living tissue within a given trophic level |
| biogeochemical cycle | process in which elements,chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another. |
| limiting nutrient | single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem |
| weather | condition of earth's atmosphere at a particular time and place |
| climate | average, year-after-year conditions of temperature and precipitation in a particular region |
| green house effect | natural situation in which heat is retained in earth's atmosphere by carbon dioxide, methane, water vapor, and other gases |
| biotic factor | A factor created by a living thing or any living component within an environment in which the action of the organism affects the life of another organism, for example a predator consuming its prey. |
| abiotic factor | A non-living chemical or physical factor in the environment |
| niche | The specific area where an organism inhabits. |
| logistic growth | a statistical model; in epidemiology, a model of risk as a function of exposure to a risk factor. |
| carrying capacity | argest number of individuals of a particular species that can survive over long periods of time in a given enviroment, this level depends on the effect of the limiting factors |
| demography | The study of races, as to births, marriages, mortality, health, etc. |
| green revolution | advances in genetics, petrochemicals, and machinery that culminated in adramatic increase in crop productivity during the third quarter of the20th century |
| renewable resource | A type of natural resource that cannot be replenished or takes time for nature to produce or replenish in order to sustain the rate of consumption. |
| pollutant | An undesired contaminant that results in pollution. |
| biodiversity | he existence of a wide range of different types of organisms in a given place at a given time |
| biological magnification | the process whereby certain substances such as pesticides or heavy metals move up the food chain. |
| demographic transition | is the transition from high birth and death rates to low birth and death rates as a country develops from a pre-industrial to an industrialized economic system. |
Created by:
sofialunsford
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