There's no need to insist that evolution is due to pure chance only. In general that assumption is made but I would say it's incorrect. The assumption is due to a polarisation, so that many of the most outspoken pro evolutionists are atheists, as I am, but they don't properly know the meaning of atheism. There's no edict that states that all atheists have to be logical positivists. There's no edict that states that evolutionary divergence of mutation must be random. That's an assumption. Some assumptions are better than others. Assumptions are often good if they're helpful and often not so good when they're the result of lazy thinking or of an inability to entertain challenging ideas.
Ok... if it's not random than there must be some intention behind it, which completely contradicts everything evolution tries to say.
That's also why the entire theory of evolution cannot agree with the bible. The bible shows intention and purpose behind the universe; evolution clearly says that x,y,z happened to be in the place to form the amino acids, happened to get struck by lightening, and there happened to be energy at all to be begin the big bang in the first place.
Species changing within themselves and and adapting is not contradicted by the bible, however. The bible does not agree with the overarching theory, but neither does it contradict the very solidly proven scientific facts like the difference between a wolf and a dog.
Whaaaat is going on here?
This is getting seriously off topic people.