But it shouldn't take a million years. it should take a nano-second. Here you have this single-celled creature, now it's a multi-celled one.
And if I sling together enough mutations to do the same thing in a timely fashion in the lab, you'll simply say that this is no evidence of "natural processes" when a person does it, right?
Actually, no. Has this been done?
You should google up "slime molds" for fun. Start here.
Actually, no. Has this been done?
You started out life as a single-celled creature, didn't you? ;)