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provides protection from dessication and reduces the dependence of tetrapods on water
How is the amniotic egg a key innovation?
amniotic egg, ribcage, keratin, internal fertilization
What are the shared derived traits of amniotes?
crocidilians, birds, extinct dinosaurs and pterosaurs
The Archosaurs consist of what group of animals?
carnivors, herbivores, omnivores, largest herbivores to live on land, largest carnivores such as the T-Rex
bipedal saurischian dinosaurs, birds
What are the theropods and what are they closest related too...
wings, feathers, sternum, loss of teeth, endothermic, four chambered heart, excellent eye sight, larger brain
What traits of birds make this clade highly derived...
ectothermic, predators, moved like ancestral amniotes
Describe a characteristic of a synapsid that was before the dinosaurs
more differentiated teeth, legs underneath them, more mammal like, predators
Describe the characteristics of Therapsids and Cynodonts
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