(April 21, 2014 at 10:39 pm)Revelation777 Wrote: Who or what decides this? Is evolution some sort of supreme being that says - ok, you turn into this then stop and you are gonna be this?
That's easy; the mutations are random, and you just kinda get what you're given, there. However, once you're out in the world, the environment around you and the context you find yourself in will determine whether those mutations are harmful, beneficial, or neither. If it's the latter two, you have a better chance of survival, and thus a better chance of reproducing and passing along those traits of yours that put you in that position.
If it's the first one, your chances of surviving and passing on those genes decreases, since you'll be dying a lot easier. Since only genes that get passed on are present in later generations, this simple interaction of environment and genome determines what your species will become down the line.
"YOU take the hard look in the mirror. You are everything that is wrong with this world. The only thing important to you, is you." - ronedee
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Want to see more of my writing? Check out my (safe for work!) site, Unprotected Sects!