Question

Based on fossil evidence, about how long ago did the first single-celled life form appear on Earth?

Answer 1

Earliest life forms. Fossil evidence informs most studies of the origin of life. The age of the Earth is about 4.54 billion years; the earliest undisputed evidence of life on Earth dates from at least 3.5 billion years ago. There is evidence that life began much earlier.

Answer 2

Answer:

Lkjhhgggfdsssaaaasdrgghhuuiii khggggghjalaoiahdhd