Early Cambrian suspension feeders included
A) anomalocarids and monoplacophorans.
B) archaeocyathids and other sponges.
C) brachiopods and eocrinoids.
D) stromatolites and other animals.
Correct Answer:
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Q5: The burrow Treptichnus pedum marks the base
Q6: The hard-skeleton burrowers of the Ordovician were
A)
Q7: _ experienced a mass extinction at the
Q8: During Ordovician, the decline of stromatolites was
Q9: Cambrian seas
A) rarely encroached on the land
Q11: The main Ordovician floating animals were the
A)
Q12: The earliest known vertebrate animals were the
A)
Q13: The largest Ordovician predator was a
A) variety
Q14: The oldest organic reefs with skeletal structures
Q15: Each of the first three Cambrian mass
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