This is a fully editable Microsoft PowerPoint presentation designed for the new OCR A Level Biology A Specification for first teaching in 2015. It covers content under unit 4.2 Classification and Evolution (Module 4 Biodiversity, evolution and disease) Including: Darwin’s Initial Observations Darwin’s Conclusions Contributions to the ‘Theory of Evolution’ Natural Selection Darwin’s Finches Allopatric Speciation Sympatric Speciation Although this resource has been designed for the OCR A specification much of its content is relevant for other A Level Biology specifications.**** Please also check out my other A Level Biology resources!****