you know people cant be called living been without them been changed i mean if a little bird didnt learn how to fly it wont live
thats why human seek changes but we must pick our changing wisely
god creature (i mean animal or human) can adapt living in a differnt way just to survive even if his mind dosent want too
smoking in a medical veiw
human body can adapt against smoking by a mechanism called metaplasia
(in brief it change the kind of cell the trachea and bronchi are replaced from the normal ciliated columnar epithelium to stratified squamous )
because it is flat and can endure gases more than columnar .
changes in body charcteristic is a really dangerous if the body adapting system cant take it anymore it might turn to cell injury and might turn to cancers .
of course adapting system differ from someone to another and we dont know how to measure thats power thats why......