BGYB51H3 Lecture 3 Notes Sep 17 2009

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University of Toronto Scarborough
Biological Sciences
Maydianne Andrade

BGYB51H3 Lecture 3 Notes -Z2}oK}}KooZ}]}Z}]L[ZZ} -through natural selection, species can change in characteristics through time -looking at species of plants and animals, humans domesticated for their own use -domestication through artificial selection causes species to evolve (e.g. dogs from wolves) -social evolution is imposed on offspring and pets through selection of certain behavioural traits -social competence through communication is selected in dogs -many varieties can derive from a single ancestor -agriculture required plants through domestication by artificial selection of a mustard plant to yield certain vegetables -artificial selection does require variation, heritability, and different variants producing different numbers of offspring -artificial selection involves an agent of selection which is the human -environment is the agent of natural selection -artificial selection involves conscious intent and a goal -natural selection involves no conscious intent or goal -different types of descendants from one common ancestor are possible -geological evidence came from scientists who may have been unaware of evolution but wanted to learn patterns of rock in strata -characteristics of layers were observed and compared through fossils found -order of deposition is inferred through relat
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