Topic 17: Selection and evolution (CIE A-level Biology)

This bundle contains 8 detailed and engaging lessons, and together they cover a lot of the key content of topic 17 in the CIE A-level Biology specification. Selection and evolution are key processes in Biology but are not always well understood or well explained by students. With this in mind, these lessons have been designed to support students in making links between the different concepts.

The following specification points are covered by these lessons:

• The differences between continuous and discontinuous variation
• Using the t-test to compare the variation of two different populations
• The importance of genetic variation in selection
• Natural selection
• Environmental factors can act as stabilising, disruptive and directional forces in natural selection
• Selection, the founder effect and genetic drift affect allele frequencies in populations
• Using the Hardy-Weinberg principle
• The molecular evidence that reveals similarities between closely related organisms
• Allopatric and sympatric speciation

If you would like to sample the quality of lessons in this bundle then download the following lessons as these have been shared for free

• continuous and discontinuous variation
• molecule evidence and evolution