Biology, 08.10.2021 03:10 sasalinas2001

The geologic time scale A.
began when life first appeared and ended when humans first appeared.
B.
began when life first appeared and still continues today.
C.
began when Earth formed and ended when humans first appeared.
D.
began when Earth formed and still continues today.

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The geologic time scale A.
began when life first appeared and ended when humans first appea...