RE: Atheism is a religion
February 1, 2012 at 6:36 pm
(This post was last modified: February 1, 2012 at 7:12 pm by Mister Agenda.)
(February 1, 2012 at 4:59 pm)Undeceived Wrote:Quote:Yes, about 99% of all species that ever existed are extinct, exactly what you have just said we would expect if evolution were true.
http://www.endangeredspeciesinternationa...view1.html
905 discovered extinct species
8,700,000 (8.7m) living species
Dare I ask where you learned math?
We may be finding more extinct species by the year, but we're finding more living species by the day.
Sigh. It is your presumption that the earth is young that blinds you to the obvious. The vast majority of organisms that have ever lived have gone extinct. From the Wikipedia article on extinction:
Through evolution, new species arise through the process of speciation—where new varieties of organisms arise and thrive when they are able to find and exploit an ecological niche—and species become extinct when they are no longer able to survive in changing conditions or against superior competition. The relationship between animals and their ecological niches has been firmly established. A typical species becomes extinct within 10 million years of its first appearance, although some species, called living fossils, survive virtually unchanged for hundreds of millions of years. Most extinctions have occurred naturally, prior to Homo sapiens walking on Earth: it is estimated that 99.9% of all species that have ever existed are now extinct.
(February 1, 2012 at 4:59 pm)Undeceived Wrote: Genkaus, why do you think scientists predict all human skin colors will be the same (a middle Mandarin tone) in a thousand years?
It's true that genetic isolation plays a role in divergence, and it's intuitive that with people from every continent interbreeding the trend would be toward an 'averaging' of skin tones and other traits. If this were to happen it would be evolution in action. The operative definition of evolution in biology is 'change in allele frequency over time' and all humans winding up with the same shade of skin would certainly be that.
However, one of the things science teaches us is that intution must be verified. More recent estimates indicate that humans will continue to become more different based on their native continent because genetic intermixing is insufficient to overcome genetic drift. The averaged skin hue is the future of the melting pot continent of North America (which is probably the source of your prediction), but that is not the trend on the other continents inhabited by humans.
(February 1, 2012 at 4:59 pm)Undeceived Wrote: Because we combine and lose information the more generations we mate. When a brown-haired man with one recessive red-hair gene crosses with a blond-haired woman with no recessive red-hair genes, chances are the child will not get red hair and the red-hair phenotype will die out in that line.
OK. Say my mother has two genes for blue eyes and my father has one gene for brown eyes and one gene for blue eyes. I have a fifty-fifty chance of having brown or blue eyes. Say I have brown eyes and my wife has brown eyes and she has both genes for brown eyes. All of our children will have brown eyes, including the ones with one gene for blue eyes (the most they can get). If my daughter with one brown eye gene and one blue eye gene marries a man with both genes, any of their children will have a 1 in 4 chance of having blue eyes, and will have both blue-eye genes just like my mother. Recessive genes don't die out just because they're recessive. If the gene is neutral (no advantage or disadvantage to having blue eyes), it may or may not be conserved over generations, no particular trend one way or the other except by chance.
(February 1, 2012 at 4:59 pm)Undeceived Wrote: Meanwhile, we don't see any babies with green hair or hair with fur consistency. New genes are only developed by mutations, period. Google it.
Evolution doesn't predict any specific future mutations. It has to work with whatever mutations appear. Beneficial and potentially beneficial mutations in humans have been observed. Google it.
And who claimed that new genes are not developed by mutations? It's not exactly a news flash that genes change by mutation. It's their frequency that is modified by selection.