what is a bird? Flashcards
1
Q
what were the characteristics of dinosaurs that birds evolved from?
A
feathered limbs but also had teeth
2
Q
what were the skull characteristics of archaeopteryx?
A
antorbital fenestra of archosaurs
reptilian teeth
had social complexity of farmyard chickens
3
Q
how did the skeleton evolve?
A
braincase expanded
fused manual bones
fused pelvic bones
reduced and fused tail bone - pygostyle
uncinate processes on ribs
sternum expanded to large keel
