Aristotle classified all warm-blooded fur-covered tetrapod vertebrates that give birth to live young as: the viviparous quadrupeds the malacostraca the fish the ostracoderms the oviparous quadrupeds

Explain why birds are considered reptiles

Orrorin tugenesis was bipedal because it left footprints that showed it had an arch to its foot like modern humans. True or False

In the phylogeny below, the origin of which trait could be indicated by the letter B? A single temporal opening on the side of the skull Extra-embryonic membranes A placenta Jaws Hair and mammary glands lungfish frogs salamanders caecilians parareptiles turtles lizards mosasaurs snakes ichthyosaurs plesiosaurs crocodiles ornithisichian dinosaurs non-avian saurischian dinosaurs birds eothyridids caseids varanopids ophiacodontids edaphosaurids sphenacodontids biarmosuchians dinocephalians squopowoue gorgonopsians therocephalians snupeubossejeyɔ Probainognathus uopouoɔous marsupial: monotremes placentals