By The_________ Period, Large Tropical Swamps Extended Across North America

Q31: The beginning of the Phanerozoic marks an

Q32: Modern human evolution takes place during the

Q33: On continents, large "core areas" of Precambrian

Q34: The _Eon spans about 88% of Earth's

Q35: As the solar system began forming, the

Q37: _means "planets in the making."<br>A)Protoplanets<br>B)Jovian<br>C)Terrestrial<br>D)Asteroids<br>E)none of the

Q38: The_ were the dominant trees of the

Q39: During the late Paleozoic, the present- day

Q40: The first true terrestrial animals were the

Q48: Western North America is the leading edge