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now the way scientists say it goes is that plants came first then they made enough oxygen for animal to live but where did the animal come in? because for this to work they would of had to evolve from a plant, and how the hell can that happen, i mean i dont have a clue about any animal/plants or heard of any. so how do ya think it happened??
Well, I always heard single-celled animals started as animal-like creatures. The problem was that competition for food became too fierce. The speculation is that some of them figured out a nifty trick: photosynthesis. That gave rise to plants which in turn gave rise to more complex animals which in turn gave rise to...well, you get the point.