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AP Biology Chapter 53 Flashcards

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724204799age structurethe relative number of individuals of each age in a population0
724204800big-bang reproductionreproduction in which an organism produces all of its offspring in a single event; also known as semelparity.1
724204801carrying capacitythe maximum population size that can be supported by the available resources, symbolized as K2
724204802cohorta group of individuals of the same age in a population3
724204803demographic transitionin a stable population, a shift from high birth and death rates to low birth and death rates4
724204804demographythe study of changes over time in the vital statistics of populations, especially birth rates and death rates5
724204805densitythe number of individuals per unit area or volume6
724204806density dependentreferring to any characteristic that varies with population density7
724204807density independentreferring to any characteristic that is not affected by population density8
724204808dispersionthe pattern of spacing among individuals within the boundaries of the population9
724204809ecological capacitythe natural limit of a population set by resources in a particular environment10
724204810ecological footprintthe aggregate land and water area required by a person, city, or nation to produce all of the resources it consumes and to absorb all of the waste it generates11
724204811emigrationthe movement of individuals out of a population12
724204812exponential population growthgrowth of a population in an ideal, unlimited environment, represented by a J-shaped curve when population size is plotted over time13
724204813immigrationthe influx of new individuals into a population from other areas14
724204814infant mortalityA figure that describes the number of babies that die within the first year of their lives in a given population15
724204815iteroparityreproduction in which adults produce offspring over many years; also known as repeated reproduction16
724204816K-selectionselection for life history traits that are sensitive to population density; also called density-dependent selection17
724204817life expectancy at birththe predicted average length of life at birth18
724204818life historythe traits that affect an organism's schedule of reproduction and survival19
724204819life tablean age-specific summary of the survival pattern of a population20
724204820logistic population growthpopulation growth that levels off as population size approaches carrying capacity21
724204821mark-recapture methoda sampling technique used to estimate the size of animal populations22
724204822metapopulationa group of spatially separated populations of one species that interact through immigration and emigration23
724204823populationa group of individuals of the same species that live in the same area and interbreed, producing fertile offspring24
724204824population dynamicsthe study of how complex interactions between biotic and abiotic factors influence variations in population size25
724204825population ecologythe study of populations in relation to the environment, including environmental influences on population density and distribution, age structure, and variations in population size26
724204826repeated reproductiona life history in which adults produce large numbers of offspring over many years; also known as iteroparity.27
724204827reproductive tablean age-specific summary of the reproductive rates in a population28
724204828r-selectionselection for life history traits that maximize reproductive success in uncrowded environments; also called density-independent selection29
724204829semelparityreproduction in which an organism produces all of its offspring in a single event; also known as big-bang reproduction30
724204830survivorship curvea plot of the number of members of a cohort that are still alive at each age; one way to represent age-specific mortality31
724204831territorialitya behavior in which an animal defends a bounded physical space against encroachment by other individuals, usually of its own species32
724204832zero population growth (ZPG)a period of stability in population size, when additions to the population through births and immigration are balanced by subtractions through deaths and emigration33

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