3.2 Origins of Biodiversity

Species can adapt to changes in their environment through the process of natural selection. These changes can be so significant that the organisms can be said to be a new species. All life on Earth originated from a single common ancestor and the huge variety of species on Earth today exists as a consequence of evolution through natural selection.


1Natural selection
2Isolation and speciation
3Mass extinctions and the sixth mass extinctions
Chapter Workbook
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Essay Task

“Discuss evidence that suggests we are in a sixth mass extinction.” [9 marks]

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