On Continents, Large "Core Areas" of Precambrian Rocks, Called_________

Q28: Due to a virtual absence of land

Q29: Earth's primitive atmosphere evolved from gases _.<br>A)collected

Q31: The beginning of the Phanerozoic marks an

Q32: Modern human evolution takes place during the

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

Q35: As the solar system began forming, the

Q36: By the_ period, large tropical swamps extended

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

Q83: The development of _,organisms that reproduce sexually