[quote] According to Natural Selection, it affects the physical because of the current environmental hazards affecting the biology of the organism in that environment. Correct? It serves to evolve those that are at a physical advantage, and cause those that are at a physical inconvenience to die before procreation among its own kind [/quote] Natural selection is the gradual process by which heritable biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential reproductive success of organisms interacting with their environment. It is a key mechanism of evolution. It does not serve anything. There is no guided path that selection goes down. Whatever traits or genes are advantageous in an organism/population will be passed down a lot more than the traits that are not. The less advantageous group [i]may[/i] die out after long periods of time, especially if the environment does not change to which they're traits become more useful. However, the weaker group does not have to die out. You can see this with Darwin's Finches. On each island of the Galapagos there are at least two different beaks. One that is very big and strong for tough seeds, and one that is smaller for small seeds. When it is dry, big seeds are plentiful, making the first beak a better trait. In the wet season, smaller seeds are plentiful which makes the smaller beaks more useful than the big and strong ones. Those with "worse" traits can still mait, they just won't as much as the ones with favorable traits, and they will live shorter lives. Evolution takes very long periods of time in most cases, they don't just jump to a new limp, appendage or species. [quote]Hypothetically, if a fish wanted to go on land, it would have to gradually develop the ability to do so over many generations. Correct? Answer: Limbs. ...but what does this do to the biology of the animal? Answer: It becomes no longer streamlined; and so, according to Natural Selection, it naturally dies, [/quote] It's actually much more likely that life started on land. So an animal could have "wanted" to go into water. People, are not great swimmers. We don't have webbed feet, or big lungs. Yet we can swim reasonable well. That trait, is not a negative thing for us. Just because we aren't the strongest swimmers doesn't mean we will just die out like you say. Natural selection in no way, contradicts Evolution. Saying that just demonstrates your ignorance on the matter.

Basically, if another trait is favored that makes an organism less streamlined, and there is no selection for being streamlined, then the new trait can affect the streamlined appearance of the organism. Example: antlers, fur, non webbed toes, etc.