The Burgess Shale is significant because it contains mostly soft-bodied fossils.
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Q1: Trilobites make excellent guide fossils.
Q2: The first evidence of shelled organisms is
Q3: The three differentiated components of a trilobite
Q4: Devonian mass extinctions were partly caused by
Q6: Pelagic organisms live in the water column
Q7: Burrowing worms are examples of planktonic organisms.
Q8: Plankton are small animals and plants that
Q9: The ammonoids are excellent guide fossils because
Q10: The end-Devonian mass extinction affected polar and
Q11: There is no evidence in the geologic
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