A'isha
Miss Schoolteacher
So bacteria were never around for extinction events or local environmental catastrophes?
Of course they were. It's just that, when it comes to larger multicellular animal forms, other taxa had a headstart that bacteria couldn't compensate for.
That's why wolflike mammals evolved into whales in the wake of the K-T Event, and bacteria didn't.
The fact is the niche of aquatic life being filled enabled whales to evolve according to evos and so disproves your point.Of course, you can say it's a different niche and well, that would be true of any major new forms evolving from bacteria too. Either way, your claim and logic doesn't work.
Except for the not-so-minor point that you're using "niche" extremely incorrectly.