Human Evolution Takes Place During the ________ Period of the ________

Q124: Human ancestors developed the tendency to walk

Q125: What group of animals were the first

Q126: The largest mass extinction in the Phanerozoic

Q127: The Goldilocks scenario suggests that _.<br>A)we are

Q128: Following the reptilian extinctions at the close

Q129: Volcanic activity was common in western North

Q130: The major adaptions that made it possible

Q131: The _ were the dominant trees of

Q132: The major source of oxygen in Earth's

Q133: Trilobites brachiopods fish dinosaurs