Take Home Essay 1 - Take Home Essay 1 During phase A of the graph the population size increases exponentially as time increases forming a J-shaped

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Take Home Essay 1 During phase A of the graph, the population size increases exponentially as time increases forming a J-shaped curve. This happens because every member of the population had access to abundant food and is free to reproduce. Under this ideal condition, the population takes on the intrinsic rate of increase, which is the maximum per capita rate of increase for a population. Even though the intrinsic rate is constant, the population grows exponentially because there are more offspring when the population is large than when it is small. During phase B, the graph exhibits population cycles, the fluctuations in population size in response to environmental limiting factors like competition for resources, predation, and disease. Those three limiting factors are all density dependent; meaning they have a greater effect on a crowded population than a population that is scattered and spread out. As a population’s density increases, the competition for limited amount of resources like food and space intensifies. As food gets scarce, some
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This note was uploaded on 03/03/2010 for the course AP BIO AP BIO taught by Professor Apbioteacher during the Spring '09 term at École Normale Supérieure.

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Take Home Essay 1 - Take Home Essay 1 During phase A of the graph the population size increases exponentially as time increases forming a J-shaped

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