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bigboy

bio note cards

QuestionAnswer
ecology scientific study of interactions among organismsand their environment
bioshere part of earth in which life exists including land water and air or atmoshere
species group of similar organisms that can breed and reproduce fertile offspring
population group of individuals of the same species that live in the same area
community assemblage of different popu,ations that lived together in a defined area
ecosystem collection of ALL THE ORGANISMS THAT LIVE IN A PARTICULAR PLACE TOgether with their nonliving environment
autotroph organism that can capture energy from sunlight or chemicals and use it to produce its own food inorganic compounds also called a producer
heterotroph organism that obtains energy forom the food it consumes also called a consumer
food web network of complex interactions formed by the feeding relationships among the various oganisms in an ecosystem
trophic level step in food chain or food web
biomass total amoount of livin gtissue within a given trophic level
biogoechemical cycle process in which elements, chemical compounds and other forms of matter are passed from one oraganism to another and from one parts of the bioshpere to another.
limiting nutrients single nutrient that is scarce or cycles very slowly, limiting the growth of organisms in the ecosystem
weather condition of earths atmosphere ata particular time and place
climate average year after year conditions of temperture and precipiation in a perticular region
green house effect natural situation in which heat is retained in earths atmosphere by cobon dioxide, methane, water vapor and other gases
biotic factor biological influence on organisms within the ecosystem
abiotic factor phsical non living factor that shapes the ecosystem
niche full range of physical and biological conditions in which an organism lives and the way in which the organisms use those conditions
logistic growth growth pattern in which a populations growth rate slows or stops following a period of exponential growth
carrying compacity largest number of indiduals of a population that a given envirnment can support
demography scientific study of human populations
demographic transition change in population from high birth and death rates to low birth and death rates
green revolution the development of highly productive crop strains and the use of modern agricultural techniques to increase yeilds of food crops
renewable resource resource that can regenerate quickly and that is peplacrable
popullant harmful material that can enter the bioshere through the land air or water
biodiversity biologicalo diversity ths sum total of the variety of organisms in the biosphere
biological magnification increasin concentration of a harmful substance in organisms at higher trophic levels int he food chqain or food web
Created by: tommyboy69 on 2011-09-27



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