The ______period was the "golden age of trilobites."
A) Ordovician
B) Devonian
C) Silurian
D) Cambrian
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Q116: Toward the end of the Mesozoic era,
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Q120: Primitive organisms, called _ nuclei.
A) stromatolites
B) eukaryotes
C)
Q122: Examine Figure 12.12 below, which illustrates the
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Q124: Why is it so difficult to interpret
Q125: The _were the dominant trees of the
Q126: Compare and contrast the patterns of life
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