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1、12345In 20 minutes the population is 2In 40 minutes the population is 4In 1 hour: the population is 8In 2 hours: 64In 3 hours: 512In one day: 4,720,000,000,000,000,000,0001 million500,000100One yearPopulation sizePopulationGrowthcan berepresented bycharacterized bycharacterized byrepresented bywhich
2、 cause aExponentialgrowthLogisticgrowthFallinggrowth rateS-shapedcurveLimits ongrowthNo limits on growthJ-shapedcurveConstantgrowth rateUnlimitedresourcesJ curveS curveCarrying capacityExponential growthTimePopulationDISEASESPACEPREDA-TORSFOOD0Lynx and Hare Pets Sold to the Hudsons Bay CompanyNumber
3、 of organisms in thousands)Times (in years)LynxHareMooseWolvesBoom-and-Bust CurveTimePopulation DensityLimitations on Population GrowthAgriculturebeginsPlowingand irrigationBubonicplagueIndustrialRevolutionbeginsHuman Population GrowthAgriculture beginsPlowing and irrigationBubonic plagueIndustrial
4、Revolution BeginsUntil about 500 years ago, the population grew slowly. Agriculture and industry made life easier and safer.Population Distribution Per Age Range for Several CountriesAgeStable growthRapid growthSlow growthMaleFemaleReproductive yearsPopulation (percent of total for each country)U.S.
5、 PopulationRwandan PopulationAge StructureEmissions to AtmosphereNitrogen oxidesSulfur dioxideChemical TransformationNitric acidSulfuric acidPrecipitationAcid rain, fog,snow, and mistDry FalloutCondensationparticulates, gasesIndustryTransportationOre smeltingPower generationSection 6-2InsectsBacteriaFungiPlantsProtistsOther Animals54.4%4.2%18%3.4%0.3%19.7%Species DiversityWaterProducersZooplanktonSmall FishLargeFishFish-Eating BirdsMagnification ofDDT Concentration100010,000100,0001,000,00010,000,0001
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