The earliest known vertebrate animals were the
A) conodonts.
B) brachiopods.
C) archaeocyathids.
D) deposit feeders.
Correct Answer:
Verified
Q7: _ experienced a mass extinction at the
Q8: During Ordovician, the decline of stromatolites was
Q9: Cambrian seas
A) rarely encroached on the land
Q10: Early Cambrian suspension feeders included
A) anomalocarids and
Q11: The main Ordovician floating 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
Q16: Pikaia was a swimming chordate whose fossils
Q17: What was the position and orientation of
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