Writer's Choice – Assignment Example
In evolution, a “fact” is the genealogical connection of all animals from a single ancestor. In the science community, professionals can only point out an issue but cannot establish truth. In other words, most of the known facts can still be questionable and it only identifies, as “fact” if there have been sufficient confidence ascertained in the issue that qualifies it to be “true”, or a fact. As a theory, on the other hand, evolution is the history of a given lineage as a process that involves several modifications in the descent.
There are several evidences that are given by Gould in the article to support evolution. The facts that whale have tiny vestiges of leg bones is a clear evidence of the process of evolution. As seen with snakes, also, there are pelvic bones in some snakes which shows that these, now useless part of the body, survived as vestiges from ancestors of the snakes that did have legs. Gould gives the discoloration of moths as another example of evolution only that unlike that of animals changing their entire morphology over a very long time, this evolution takes place in a span of few years. Lastly, the ability of bacterial to develop resistance to certain medication, as seen in malaria, is also another type of evolution for the pathogens.
Among the evidence Gould gives above to support evolution, none of them is as less debatable as the presence of vestiges in organisms. Whales, for instance, do not need legs. They are mammals that do very well in their natural habitat. The presence of tiny vestiges found underneath their skin is a clear indication that their ancestors needed legs to navigate through the water, maybe as frogs do. That also means that the ancestors might have walked the earth like any other mammals on the surface of the earth.
According to most nineteenth century contemporaries of Darwin, the individual cells of any organism had obscure purposes meaning that it was either unknown or vague. In this regard, evolution did not depend so much on the very core of an organism. Darwin does not account for the complexity that exists in the molecular level of an organism. In irreducible complexity, Behe states that evolution could not occur if there were no specialization in the molecular level. If a single organelle such as the flagella disappeared, maybe through natural selection, then the organism would not be able to move. Natural selection, therefore, chooses systems already working as supported by irreducible complexity and contrary to the foundations of Darwin theory.
Behe J.M., The Challenge of Irreducible Complexity: Every living cell contains many ultra sophisticated molecular machines, Retrieved from http://actionbioscience.org/evolution/nhmag.html
Miller R. K. The Flaw in the Mousetrap: Intelligent design fails the biochemistry test, Retrieved from http://actionbioscience.org/evolution/nhmag.html