The conodontomorphs first appeared during
A) Early Ordovician.
B) Late Cambrian.
C) Middle Cambrian.
D) Early Cambrian.
Correct Answer:
Verified
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
Q19: The trilobites first appear during
A) Early Ordovician.
B)
Q20: The organism that left tracks on sediment
Q21: The shift toward heavier oxygen and carbon
Q22: The second phase of the great Ordovician
Q23: During Late Cambrian and Early Ordovician, eastern
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