Homology and analogy
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thylaosmilus
a marsupia mammal
morphology
the study of the forms and strucutre of an organism
smilodon
a placental mammal
tetrapod
built from many individual bones; all spin-odds of the same basic bone
what are the six bones found in all tetrapod legs
humerus, radius, uina, carpals, metacarpals, phalanges
analogy
similarity due to convergent evolution, not common ancestory
what three criteria are used to determine whether something is a homology or analogy?
structure, relationship, development
homology
traits inherited by 2 different organisms from a common ancestor
