Historic reasons, as Borek says, initially. Today you'd really have to add biochemistry as well.One boy asks me: why did they (chemists) classify chemistry into organic and inorganic ? It seems simple, but not really. Can anyone give me a clear explanation?
True! ... http://www.alaska.net/~clund/e_djublonskopf/Flatearthsociety.htmThat was disproved about 200 years ago, though it can take a while for scientific fads to die.