___________ experienced a mass extinction at the end of Cambrian, from which they later recovered.
A) Graptolites
B) Brachiopods
C) Trilobites
D) Conodonts
Correct Answer:
Verified
Q2: The most spectacular Early Cambrian arthropods were
Q3: _ found as fossils show us that
Q4: _ are the horn corals, which became
Q5: The burrow Treptichnus pedum marks the base
Q6: The hard-skeleton burrowers of the Ordovician were
A)
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)
Q12: The earliest known vertebrate animals were the
A)
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