Greetings ! I realize that evolution goes on due to random mutations of individuals in the spicies and then survival of the fittest along a sufficiently long period of time. My question is, and please go easy on me 'cause I know very little about this stuff, is it all random like I discribed or is there a certain feedback also involved in terms of a single individual from the environment. I mean if one organ is used more than it's supposed to and another one is used less by a single creature would it somehow provide a feedback to the genes or is it all just random and separated by generations of creatures ? (I guess not since each gene is supposedly responsible of a whole organ or whole parts of an organ and there's supposedly nothing internal to change in it plus you'll have to change other genes - organs for the relevant one to evolve accordingly in the next creature, but I was just wondering whether something like that is known and/or possible.) Thanks ! Live long and prosper.