DieCommie said:

Its not random that Polar Bears become white. White color is an advantage for procreation in the north pole. Pressures from other organisms drive polar bears to become white because it is white in the north pole. Thats what I mean when I say the pressures are not random.

Now the tint of a new generation's fur will randomly be some color around the old generations. That mutation is fairly random.

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Entropymancer said:

DieCommie said:

Its not random that Polar Bears become white. White color is an advantage for procreation in the north pole. Pressures from other organisms drive polar bears to become white because it is white in the north pole. Thats what I mean when I say the pressures are not random.

Now the tint of a new generation's fur will randomly be some color around the old generations. That mutation is fairly random.

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You're not quite up on why polar bears are white, I see.

They aren't actually white, the hair is actually translucent. It basically works like fiber optics, the light hits the end of the hair, and the hair (having a low angle of reflection) transmits this energy to the bear's skin as heat.

But you and I are more or less on the same page, I think.

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Drise said:

Environment is an important part of the evolution
The rest is natural selection. The modern hyena, Manatee and Elephant have all evolved from a single ancestor as well as a lot of other species. The modern synthesis says the population is the basic unit of evolution which is interbreeding individuals in a specific area, what causes them to move around are a number of facts, prey depletion, storms, if they can fly a group can migrate. When a population arrives in a new area an individual with alleles (traits) that are disadvantageous aren't going to survive and those with helpful, or not harmful traits will begin to evolve away from where ever their founder population is.Small changes over a long period make for graduate changes that create an entire new species, variation in traits is somewhat random in that the dominant and recessive genes that are inherited are paired on different odds every time. You can't have four kids and get one with each set of traits. Each time its a one in whatever chance. Mutations deletion and replication of genes can occur, the systems not perfect and those traits may be helpful, but 99% of the time its harmful.

Hope that helped a little.

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Entropymancer said:

It is coincidence though. The bears are white because they're in a cold environment, and happened to evolve a mechanism to more effectively collect heat.

But the fact that the bears are in a cold environment is pretty much random. Or based on the random wanderings of its ancestors

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Drise said:

Eye color is due to a number of genes, we mapped the genome a while ago and eventually we will now exactly what every gene does and be able to control evolution on an entirely new level.

I personally don't like the idea.

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Drise said:

Eye color is due to a number of genes, we mapped the genome a while ago and eventually we will now exactly what every gene does and be able to control evolution on an entirely new level.

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imachavel said:

Entropymancer said:

It is coincidence though. The bears are white because they're in a cold environment, and happened to evolve a mechanism to more effectively collect heat.

But the fact that the bears are in a cold environment is pretty much random. Or based on the random wanderings of its ancestors

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are you ever wrong? isn't this an argument of opinion at this point?

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guruu said:

On the genetic level it's random, but over a large timescale the environment works to make evolution follow a very logical pattern.

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Atheist said:

God made the earth 6,000 years ago

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guruu said:

Honestly evolution is one of the most fascinating subjects on the planet because it's an absolutely perfect mechanism. Nothing can beat it.

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