Topic 5.3: Populations

5.3 Populations

5.3.1

Outline how population size is affected by natality, immigration, mortality and emigration.

5.3.2

Draw and label a graph showing a sigmoid (S-shaped) population growth curve.

5.3.3

Explain the reasons for the exponential growth phase, the plateau phase and the transitional phase between these two phases.

5.3.4

List three factors that set limits to population increase.

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