Phylogenetic Trees A Show how closely related various species are B Some species look different but are actually very similar Comparative Anatomy A Homologous Structures Inherited from a common ancestor but adapted to a different function ex human hand bat wing whale ID: 499735
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Slide1
Determining RelatednessSlide2
Phylogenetic Trees
A. Show how closely related various species are B. Some species look different, but are actually very similarSlide3
Comparative Anatomy
A. Homologous Structures – Inherited from a common ancestor, but adapted to a different function (ex. human hand, bat wing, whale fin)Slide4
B. Analogous Structures – adapted for the same function, but NOT from a common ancestor (ex. Bird wings and butterfly wings)Slide5
C. Vestigial Structures – inherited but no longer serve a purpose (ex. python and whale hip bones, human body hair)Slide6
III. Comparative Embryology – compare fetal development – longer two organisms are similar, the more closely related they areSlide7
Comparative Biochemistry – compare sequences of amino acids or DNA – the more similar they are the more closely related