Re:I should have loved biology
by TeMPOraL on Thursday November 19, 2020 @08:21AM
(#25149180)
That's absolutely arbitrary too. The tree of life is a lie.
...or at least a very simplified model that breaks down as you move towards simpler and simpler forms of life. That's because horizontal gene transfer is a thing, and when you go all the way back to prokaryotes, there's so much of it going on that any "tree of life" is a statistical picture that's valid only for a select genetic marker that's used to trace dependencies. Pick a different marker, you'll get an entirely different prokaryotic tree of life.
...or at least a very simplified model that breaks down as you move towards simpler and simpler forms of life. That's because horizontal gene transfer is a thing, and when you go all the way back to prokaryotes, there's so much of it going on that any "tree of life" is a statistical picture that's valid only for a select genetic marker that's used to trace dependencies. Pick a different marker, you'll get an entirely different prokaryotic tree of life.
Life ultimately forms a graph