Biology 1002B Lecture Notes - Lecture 21: Transfer Rna, Opsin, Clustal
1 Apr 2016
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Document Summary
A lot of time, if two groups are similar and share a common traits, it"s because both of those groups share a common ancestor. Homology when similarities reflect recent common ancestry. All of these organisms have the same bone arrangement these are homologies! However, sometimes you get similarities that aren"t caused by common ancestry. Convergence, convergent evolution when two traits evolved separately (ie. eyes) Convergent evolution is basically an adaptation to a shared environment. Homoplasy traits that give you incorrect information on phylogenies. You could be fooled by misleading similarities, but you could also be fooled by differences. You might think all of these finch birds are different because they look different in reality they are the same species, they have just adapted to their environment. Very recent in evolutionary terms that they shared a common ancestor. Divergence when species have become adapted to very different environments.
