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.

Lessons

1Natural selection
2Isolation and speciation
3Mass extinctions and the sixth mass extinctions
Chapter Workbook
Vocabulary Sheet

Practicals
  • (None for this chapter)

Full PSOW here.

Essay Task

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

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The essay should marked using the Paper 2, Section B essay markbands.

PDF Version

Google Docs Version

Google Docs 3.2 essay

Open the link and make a copy to your own drive. The doc can easily be shared as an “Assignment” on Google Classroom.

A markbands rubric designed for Google Classroom is available here.