Evolution through natural selection
Evolution through natural selection

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Evolution through natural selection

Learning outcomes

After studying this course, you should be able to:

  • understand that by biological evolution we mean that many of the organisms that inhabit the Earth today are different from those that inhabited it in the past

  • understand that natural selection is one of several processes that can bring about evolution, although it can also promote stability rather than change

  • understand that the four propositions underlying Darwin's theory of evolution through natural selection are: (1) more individuals are produced than can survive; (2) there is therefore a struggle for existence; (3) individuals within a species show variation; and (4) offspring tend to inherit their parents’ characters

  • understand that the three necessary and sufficient conditions for natural selection to occur are: (1) a struggle for existence; (2) variation; and (3) inheritance

  • understand that Endler's experiment with guppies demonstrated that evolution through natural selection can occur in relatively few generations.

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