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bio flash cardss

biology flash cards

QuestionAnswer
Ecology? Scientific stud of interactions among organisims and between organisims and their enviornment
Biosphere? Part of earth in wich life exists including land, water, and air or atmosphere.
Species? Group of similar organisims that can breed and produce fertile off spring.
population? Group of individuals of the same species that live in the same area.
community? Assemblage of different populations that live together in a defined area.
Ecosystem? Collections of all the organisims that live in a particular place together with their nonliving enviornment.
Autotroph? organisms that can capture energy from sunlight or chemicals and use it toproduce its own food from inorganic compounds; also called a producer
Heterotroph? Organisim 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 organisim to another and from one part of the biosphere or another. Process in which elements, chemical compounds, and other forms of water are passed from on
limiting nutrient? Single nutrient that either is scarce or cycles very slowly limiting the growth of organisms in an ecosystem.
weather? Condition of earths atmosphere at a particular time and place.
Climate? Average year after year conditions of temperture ad precipitation in a particular region.
Green house effect? Natural situation in which heat is retained in earths atmosphere by carbon dioxide, methane, water vapor and other gasses.
Biotic Factor? Biological influence on organisims within an ecosystem.
Abiotic Factor? Physical or non living factor that shapes an ecosystem.
Niche? full range of physical and biological conditions in which an organisims lives and the way in which the organism uses those conditions.
Logistic growth? Growth patter in which a populations growth rate slows or stops following a period of exponential growth.
Carrying capacity? largest number of individuals of a population that a given enviornment can support.
Demography? Scientific study of human populations.
Demographic transition? Change in a population from high birth and death rates to low birth and death rates.
Green revoulution? The development of highly productive crop strains and the use of modern agricultural techniques to increase yields of food crops.
Renewable Resource? Resourse that can regenerate quickly and that is replaceable.
Pollutant? Harmful material that can enter the biosphere through the land, air or water.
Biodiversity? the sum total of the variety of organisms in the biosphere.
Biological magnification? Increasing cosontration of harmful substance in organisms at higher trophic levels in a food chain or food web.
Created by: 165655 on 2011-09-27



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