Microsoft_PowerPoint_-_Topic_2_Systematics_Phylogenetics_Biology_pdf_ (1).pdf

7/29/2019 Microsoft_PowerPoint_-_Topic_2_Systematics_Phylogenetics_Biology_pdf_ (1).pdf

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Descentwith modification:

Evolutionary treeof elephantfamily, basedonfossil evidence)

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The excellent fossilrecords of horsesshow those modern

horses, which have________ on eachfoot, evolved fromancestors that had

___________.

A trait, such as themodern horsessingle toe, thatdiffers from theancestral trait in thelineage is called a

______________.

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Examples of an analogous structure in two distantly related plants

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Galapagos finch Mainland finch

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Much of an organisms evolutionary history is documented in its ______.Comparing nucleic acids or other molecules to infer relatedness is avaluable tool for tracing organisms ______________________.


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Nucleolus: Most cells have 2 or more;directs synthesis of RNA; forms ribosomes.

Phylogeny can be inferred also from moleculardata

DNA and RNA sequences of _________ can becompared to determine phylogeny.

Note that each change in a nucleic acid = oneevolutionary event! The more events, the more _______related are the species.

_______ events means that a species ismore closely related.


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Microsoft_PowerPoint_-_Topic_2_Systematics_Phylogenetics_Biology_pdf_ (1).pdf