It's funny that this debate is always so hopeless. Brainwashed people can't even acknowledge the problem.
Bacteria aren't "niche". It's too easy to dismiss the problem like that!
You can try this:
Picture in your head, think of bacteria as the common "representatives" of life on earth for a second, instead of a well adapted "niche".
It's perfectly fine to do so since them being:
"primitive" (if I may say so) in their basic construction,
being sensitive and very exposed to factors that cause mutations, such as radiation
being extremely numerous,
having an extremely fast growth time
having an extremely short replication/generation time (as a driving mechanic to pass on new traits in a population for example)
being present in all possible environments, living conditions and pressures on earth,
and they even have other organisms to feed on
being 1 billion years old on earth.
Why is this line of life on earth "stuck" (bacteria, but I could have chosen yeast cells for example - just any numerous branch of life that is stuck) ?
Don't come dragging with a stupid answer like "oh, but bacteria are successful, who are you to dismiss them as primitive?" because it shows u havent understood the essence of the problem (because Im not saying that bacteria arent successful, they surely have their place - indeed they do! - but thinking of them as "representatives of life", they should have kept branching off to other forms of organisms all the time <---- these branching events doesnt hinder the rest of the bacteria to remain one cellular, numerous and successful, understand this!!!)
And dont come saying "but oh, it happened. There's mitochondria in eukaryotic cells." Because that again shows u dont understand. (isnt it a lil strange that this event "happened" to happen just only once then, 500 million years ago?)
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