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4 Cards in this Set
- Front
- Back
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Archosaur 2 major lineages
theory of archosaur---crocodile |
-crocodiles and pterosaurs
-ectothermy may be secondarily derived from endothermic ancestry |
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were dinos ecto or endo?
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ecto- just big crocodiles, growth rings in teeth, too costly bc of mass, pred-prey ratios like ectos
endo- stable isotope shit, bone cross section, rapid mammal like growth, feathers |
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BIRD FUNCTIONS
-primaries -secondaries -reaction -lift vs. drag |
-propulsion
-lift -air flow over body -lift (counteracts mass) vs. drag (backward force) |
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aspect ratio
high, low |
ratio of length to width
-high mean long distance flying -low means manuverable |
