All species can produce offspring unlike both parents, sometimes this is called mutation, but basically it's a birth defect. Imagine that there were white buterflies who bred other white buterflies but one produced an off white buterfly (slighly darker) and by being slightly darker it blended into it's eviroment a little bit better, avoiding being eating by predators, it survives to pass on it's dark genes. Let's say half of it's offspring are born off white as well, all of them have a greater chance of survival and when mating season comes, they all pass on their genes. Now let's say after several thousand years most of the butterflies are now off white, one might give birth to a butterfly with a birth defect of being even darker, but this helps it blend in even better than it's parents starting the cycle all over again. Over many years of this you could end up with black butterflies. This is just one small step in the evolution process.
2006-10-04
13:05:42
·
4 answers
·
asked by
jedi1josh
5
in
Society & Culture
➔ Religion & Spirituality
Now, what if, as the buterflies are changing colors, thier wings are also getting a little thicker, throught the same process of being born with a birth defect that makes them more able to survive. As they become black their wings get thick, and maybe they even become a little bit smaller. You now have a butterfly slowly becoming something more like a moth.
If human beings had birth defects that helped us survive. Let's say babies born with webed feet (it happens) and the world was flooded like in the movie Waterworld. In the future all humans would have webed feet because the babies born with them would morelikly survive into adulthood and pass on those genes.
2006-10-04
13:11:48 ·
update #1
Here's to Captain's question. http://www.blackwellpublishing.com/ridley/a-z/Evolution_of_the_eye.asp
2006-10-04
13:15:32 ·
update #2