Well we had to ocme form somewhere not juut out of the blue and DNA don't lie when it says our DNA is 98% the same as a slug. That is a shocker I bet. We are more related to slugs then primates if you go by that. And to say a living thing won't change if it's enviorment does is kinda silly since then it could not surivie an we would not be around or life for that matter,life is always adapting and changing,over tme of course.