GGR101H1 Lecture Notes - Lecture 4: Ardipithecus, Sympatric Speciation, Allopatric Speciation
Document Summary
2014: milankovitch effects become more obvious as we get closer to the present effects of the. Earth-sun geometry changes: these changes we are looking at are reflected in the biological environment- e. g. mass extinctions, the k-t boundary around 60 million years is quite warm but as we move into the tertiary, We evolved from these as the family hominideae, in the genus homo. Homo sapiens: this evolutionary process appears to have been largely driven by the environmental changes from the mid-tertiary, as climate cooled, tropical rainforests contracted and were replaced by grasslands and deserts in the tropical zone. This required the exploitation of different resources and the morphological changes. Geographic isolation as you could create barriers e. g. mountains, deserts 2. ) Although they might be genetically similar, they are separated by some kind of barrier which makes them develop different behavioural patterns and therefore they are not so together as they were--> a temporal separation and spatially.
