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12 Biology Organisms and Populations - Set No : 19 Question No :5

Question No : 5
               If  is represented  Birth rateIf  is represented  Death rateIf  is represented  Increase or decrease in population sizeThen exponential growth is represented by     

                a)                    b)               

                c)                    d)               

Answer No : 5
     (b).Exponential Growth Model When the resources availability is unlimited in the habitat, the population grows in an exponential or geometric fashion. As resources are unlimited than there is no inhibition from crowding.The equation is;  Birth rate,  Death rate Population density, = Rate of change of populationLet (b-d) = r, then the equation is,  Intrinsic rate of natural increaseWhen a population shows exponential growth, the curve plotted with  in relation to time, assume J shapeIn this there is no fix carrying capacity     

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