Posted: Aug 08, 2013 10:13 am
by jamest
Whether a part of an organism is successful in aiding its survival obviously depends upon more than the part itself. For example, wings aren't going to be much use to an elephant; claws would be a hindrance for humans; a sunflower can do without a brain; a tortoise can do without a tail; etc.. The success of the part hinges upon the specifics of the organism it is linked to and the environment that the organism finds itself in.

I'm sure biologists know this.