yo calen.
its simple:
species move to a different location.
the ones that have can get the food source readily available to them in their new enviornment (via mutations) survive.
so. its ramdom.
youre fucking lamarcian if you think that one can just decide to change.
ex. girrafes once had small ass necks.
they decide they want leaves from a tall tree. so they try and stretch their neck.
UM NO.
theres no such thing that allows one to push "vital forces" to a particular part of the body.
and if youre thinking "well, them bitches in the Andes have bigger lungs and hearts"
well, dude.
if them quechua pop a little baby out at sea level, that little fucker wont have them big lungs, so HA.
gots ta be passed on in the genes.

did i get my point across?
i think i found a tangent. my bad.
im enjoying my biological anthro class ;)



heh. that guys just like a jesus freak but from the east!
you cant agrue with those fuckers, they have circular logic.
they always go back to the text, so theres no bother in arguing.
they base everything off of that.