Biology IB Topic 5_ Evolution and Biodiversity.pdf - Topic 5 Evolution and Biodiversity Evolution in Biology ● ● ● The gradual development of

Biology IB Topic 5_ Evolution and Biodiversity.pdf - Topic...

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Topic 5: Evolution and Biodiversity Evolution in Biology The gradual development of something Evolution happens in populations of living organisms Evolution occurs when a heritable characteristic of a species changes Pentadactyl Limbs as Evidence for Evolution Pentadactyl limbs - a basic bone structure that is the same in animals Many groups had evolved from their common ancestor, but because they adopted different types of locomotion, the limbs developed differently, this is called adaptive radiation Homologous structures - structures that have evolved from the same part of a common ancestor, similar structure different function Natural Selection Charles Darwin was given credit 1) Species tend to produce more offspring than the environment can support 2) There is a struggle for existence, some survive, some die 3) There is a variation between individuals 4) Some individuals are better adapted than others 5) Survival of the fittest 6)
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