What type of fossil evidence may exist that would lead scientists to believe that dinosaurs were ancestors of birds? why might large dinosaurs have died out at the end of the mesozoic era, while smaller birds survived?

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal response by in order to it's core temperature.

16 select the correct answer from each drop-down menu. sharks, whales, and dolphins share similar features such as body shape and the position of fins. hoy while whales and dolphins have lungs. these differences indicate that the organisms share a comme whales also possess a vestigial pelvic bone. the presence of the pelvis bone may indicate that whales reset next

Which phrase best describes the main goal of a human community