Horses:Equus ferus caballus
Cats:Felis silvestris catus
Bats: Chironax melanocephalus
Whales: Megaptera novaeangliae
The limbs of the listed organisms are homologous structures. Each of the animals' structures was either derived from a common ancestor or indicates a similar evolutionary origin to another. The shown structures do not necessarily preform the same function, but they are indications of a similar ancestral history.
Found at: http://www.google.com/imgres?um=1&hl=en&client=firefox-a&rls=org.mozilla:en-US:official&noj=1&tbm=isch&tbnid=71brQxtknxiBaM:&imgrefurl=http://itc.gsw.edu/faculty/bcarter/histgeol/paleo2/homol1.htm&imgurl=http://itc.gsw.edu/faculty/bcarter/histgeol/paleo2/limbs.jpg&w=1024&h=497&ei=uPRAUKDkA-WY6QGP9IDgAQ&zoom=1&iact=hc&vpx=256&vpy=221&dur=618&hovh=156&hovw=322&tx=126&ty=79&sig=118436280171426898465&page=1&tbnh=80&tbnw=165&start=0&ndsp=18&ved=1t:429,r:1,s:0,i:82&biw=1024&bih=592
March 2002
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