The most common Precambrian rock type is ______rock.
A) volcanic
B) igneous
C) sedimentary
D) metamorphic
Correct Answer:
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Q110: The rock formations of the _era are
Q111: During the process of _, plants release
Q112: By the late _period, true air- breathing
Q113: Human evolution takes place during the_ period
Q114: On each continent, large "core areas" of
Q116: Toward the end of the Mesozoic era,
Q117: The beginning of the _is marked by
Q118: The first true terrestrial land animals were
Q119: Western North America is the leading edge
Q120: Primitive organisms, called _ nuclei.
A) stromatolites
B) eukaryotes
C)
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