are birds such as cassowaries and ostriches the closest links we have to velociraptor dinosaurs or are other birds more closely related?

Was the ancestor of all dinosaurs feathered or scaly?  What character condition did you get? use the picture below.

Dinosaurs website Co exist Like example what dinosaurs lived with gigiantosaurs in time line and what place of world and what species it lived with that it will see everyday like sauropods/ceratopsian/raptors or theropods or flying reptiles Can’t find good source

Which group of mammals have live birth but lack a placenta?   Group of answer choices Metatheria Eutheria Prototheria Primates

During what era did the dinosaurs become extinct.

MARSUPIALS EUTHERIANS (PLACENTAL MAMMALS) opossum thylacine Tarsipes kangaroo deer pig dog horse rabbit treeshrew lemur baboon human sloth echidna bird turtle хх = claws O = flattened nails x = hooves

Recent evidence suggests that the last common ancestor of birds and crocodylians was endornermic. False True

Along comes Dr Phil Bell and deep in the mines of Lightning Ridge, finds an amazingly preserved pterosaur that preserves feathers. He hypothesises that this means that feathers must have evolved before the origin of dinosaurs and therefore must have been primitive. How would you go about testing this hypothesis of feather origins?