Darwin’s Theory of Evolution by Natural Selection Louise Livesey.

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Presentation transcript:

Darwin’s Theory of Evolution by Natural Selection Louise Livesey

Definitions from OED Online EVOLUTION The origination of species of animals and plants, as conceived by those who attribute it to a process of development from earlier forms, and not to a process of ‘special creation’ TRANSMUTATION Conversion or transformation of one species into another; spec. applied to the form of evolution or development propounded by Lamarck ( )

Charles Darwin

Erasmus Darwin Zoonomia (1790s) Jean-Baptiste Lamarck Philosophie zoologique (1809)

Darwin’s theory of natural selection Struggle for resources within and between species Heritable variation +

Varieties of domestic dog

Darwin’s theory of natural selection Struggle for resources within and between species Heritable variation Natural selection += Individuals with the most adaptive characteristics more likely to survive and reproduce  accumulation of changes over time  new species

On the Origin of Species by Means of Natural Selection (1859)

From Darwin’s On the Origin of Species (1859)