devilchicken66 devilchicken66

11-03-2018
Biology

contestada

i need this asap!

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.
Carboniferous
B.
Devonian
C.
Cambrian
D.
Silurian

Respuesta :

emily200329rmily emily200329rmily

13-04-2018

Its B. .......................................

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