Question

With more Oxygen in the atmosphere, what behavior was likely introduced into the life system? How did this change things?

Answer 1

here's ur answer dude

It's hard to keep oxygen molecules around, despite the fact that it's the third-most abundant element in the universe, forged in the superhot, superdense core of stars. That's because oxygen wants to react; it can form compounds with nearly every other element on the periodic table. So how did Earth end up with an atmosphere made up of roughly 21 percent of the stuff?

hope it helps