Mutations create variety in a population Dylan Larkin Hoodie , and Natural Selection culls out the unfavorable results. But does this process lead to macro evolution? or micro evolution? Let's check it out.

British peppered moth

Species can and do change over time. At least some of them do. One historical example is the British peppered moth. This variety of moth has made its home in Manchester, England for, well, as far back as anyone can remember. They sport a distinctive light speckled grey coloration on their wings. They perch on trees much the same color as themselves, thereby blending in nicely with their background.

Back in the 1840's Frans Nielsen Hoodie , Manchester was developing into a major center of British industry. Factories blackened the local vegetation with soot and other pollutants. Against the dark soot covered trees, the lightly covered pepper moths stood out like beacons for bird predators. As you can well imagine, the moth population plummeted. That, however, is not the end of the story.

By 1848 Mike Green Hoodie , darker colored peppered moths began showing up. By the middle of the century, the darker variety had almost completely replaced the lighter pigmented forms in the polluted areas. In unpolluted areas, lighter colored pepper moths remained common. What do you make of it?

Evolutionists point to it as a good example of natural selection in action. If you read a book on evolution, you are likely to run across the peppered moth as proof of their theory. But when you think it over, it really doesn't prove much of anything.

Peppered moths can vary anywhere from jet black to almost white or any range of shades in between. If lighter shades are suddenly more vulnerable Gordie Howe Hoodie , certainly, darker shades will predominate. But for all practical purposes, they are still the same old pepper moths they always were.

They didn't gain any new organ, nor did they lose any old one. All we find is a change in the proportion of colors, and even that is temporary. Once the pollution cleared up Dylan Larkin Red Wings Jersey , the population returned to its predominate peppered light grey look.
Was there any permanent change? No. Was there any "evolution?" Certainly not.

Breeding programs

Breeding programs are similar dead end tales. Breeders choose chickens that produce larger eggs, cows that yield more milk, and corn with higher protein content. But sooner or later breeders run into a natural barrier. Chickens can produce eggs only so large, cows can only give so much milk. Further genetic manipulations prove useless.

In the last century, breeders improved the quality of sheep's wool and raised the level of sugar in beets from 6 to 15 percent. Then it reached its natural limit. Every breeder knows that selective "improvements" whether plants or animals can only go so far. Furthermore Frans Nielsen Red Wings Jersey , if you discontinue the artificial selection, the "improved" traits will quickly revert back to what they were before the experiment began. As far as evolution is concerned, it's just another potential example that doesn't pan out.

Insecticides

What about insects? Don't they develop resistance to pesticides such as DDT? Isn't this an example of natural selection?
Whenever a new insecticide is introduced, the first few applications are very encouraging. A small amount kills a lot of pests. Nevertheless, in a large population of insects Mike Green Red Wings Jersey , you can count on a few to be genetically immune to the chemical spray.

Those favored pests will multiply and gradually replace those killed by the insecticide. Consequently, the same chemicals will become less and less effective over time. Resistance to one or more pesticides has been recorded in more than 100 species.
What has changed? A population of insects, which had a few individuals genetically immune to a particular pesticide, has been replaced by a population in which all, or nearly all Gordie Howe Red Wings Jersey , are immune to the same pesticide.

Even that minor change is not permanent. Discontinue the pesticides and the insects tend to revert back to what they were before. Once more, no lasting change. And no evolution has occurred.

Bacteria and Antibiotics

The same story is repeated with bacteria and antibiotics. New antibiotics tend to destroy the vast majority of bacteria. Some are immune. They survive, reproduce, and replace the old strain. When the antibiotic is discontinued, the bacteria eventually revert back to their old susceptible strain. Permanent change does not occur. Of course that is lucky for us. We can use the same antibiotic to destroy most of the bacteria again.

About now you might be wondering if Natural Selection ever works as advertised. The answer may be found on the Galapagos Islands.

Darwin's Finches

Charles Darwin collected 13 species of finches on his visit to the Galapagos Islands. The birds had an uncanny resemblance to one another. In fact Womens Dylan Larkin Jersey , the only noticeable differences were their size and beaks. Why different beaks? Darwin observed that the specialized beaks allowed the birds to feed on different foods.

Those with short stout beaks were capable of cracking tough seeds, while the ones with smaller beaks could handle the easier-to-crack seeds. One species had a long thin beak and used it for eating insects. Still another group with a different beak used cactus needles to poke grubs out of cracks in wood.

These birds were spread all over the Galapagos Islands, usually one specialized beak per island. How do we account for it? Today practically everyone agrees, Darwin was witnessing the direct results of natural selection.

This is how the scientists explain it. At one time, one species of finch made its home in the Galapagos IsDog fashion is all about attitude! Just look at. Wholesale Jerseys Online Wholesale Jerseys Free Shipping Wholesale Jerseys From China Wholesale NHL Jerseys China Wholesale Throwback NFL Jerseys Wholesale Throwback NCAA Jerseys Wholesale NBA Jerseys Cheap Jerseys Cheap Jerseys China Wholesale New Basketball Jerseys