According to fossil evidence, how far back in time did life on Earth exist?
A. about 65 million years
B. about 545 million years
C. about 2.0 billion years
D. about 3.5 billion years or more
Answer:D
According to fossil evidence, how far back in time did life on Earth exist?
A. about 65 million years B. about 545 million years C. about 2.0 billion years D. about 3.5 billion years or more