Soldato
- Joined
- 8 Mar 2007
- Posts
- 10,938
Sounds like it was all just by accident and a big fluke.
No.
Firstly you are assuming that colour vision is the best solution you can have and therefore we are 'lucky' to have it. It is possible that eyesight could have evolved in completely different way that was just, if not more useful as the colour vision we have but worked in a different way.
Evolution is about solving problems, not coming up with clever desirable things.
Secondly the there is a difference between luck and chance. Given enough time and attempts even the most unlikely things will eventually happen. The chances of you personally winning the lottery in the next ten draws in highly unlikely, if you do that would certainly be a 'fluke', but the chance of anyone winning the jackpot in the next ten draws in almost certain to happen.
There would be no reason for colour vision surely. If the only aim is survival then why would it even matter?
Because you are forgetting the principles of natural selection. The things with the best tools survive the longest and reproduce the most, hence their genes are passed on and so on and so on. The more 'evolved' you are the more likely you are to reproduce which over long periods of time generates an improvement.
There are other interesting questions like the complexity of systems like blood clotting. I fail to understand how this mechanism could evolve. Until the process was completely constructed then blood wouldn't clot properly and so the creature would die.
You are making the irreducible complexity argument. Intelligent design proponents tried to say the same thing about the bacterial flagellum which was basically it couldn't have evolved because until it had all the parts it couldn't survive (or served no purpose) until all those parts had come together. This video explains that myth and why it's wrong (he also touches on blood clotting).