For the location and geologic periods represented by these rock layers, the most drastic and sudden change in life forms occurred at the end of the _______ geologic period.
A.
Cambrian
B.
Silurian
C.
Devonian
D.
Carboniferous
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Answer:
For the location and geologic periods represented by these rock layers, the most drastic and sudden change in life forms occurred at the end of the ___Carboniferous____ geologic period.
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Answer: the answer is C DEVONIAN
Explanation:
I put Carboniferous and it was wrong.
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