the earliest time that the earliest organisms possibly appeared on earth is 3.465-billion-year.
the earliest time that the earliest organisms possibly appeared on earth is 3.465-billion-year.
when is the earliest time that the earliest organisms possibly appear on earth?
3.465-billion-year
the earliest known life forms on earth are putative fossilized microorganisms found in hydrothermal vent precipitates. the earliest time that life forms first appeared on earth is unknown. they could have lived earlier than 3.77 billion years ago, possibly as early as 4.28 billion years ago, or nearly 4.5 billion years ago according to some; in any regards, not long after the oceans formed 4.41 billion years ago, and not long after the formation of the earth 4.54 billion years ago. the earliest "direct" evidence of life on earth are microfossils of microorganisms permineralized in 3.465-billion-year-old australian apex chert rocks.
earliest known life forms
if the split genes originated from random primordial dna sequences, as proposed in the split gene theory, there could be evidence that they were present in the earliest organisms. actually, using comparative analysis of the modern genome data from several living organisms, scientists have found that the characteristics of split genes that are present in modern eukaryotes trace back to the earliest organisms that came on earth. these studies show that the earliest organisms could have contained the intron-rich split genes and complex proteins that occur in today's living organisms.
split gene theory