Evolution Essay

Evolution Essay

Length: 1517 words (4.3 double-spaced pages)

Rating: Strong Essays

Open Document

Essay Preview

Charles Darwin had two great themes in "On the Origin of Species" which accounted for the similarities and adaptations

characteristic of living organisms. To account for the adaptations of organisms and those innumerable features that equip

them for survival and reproduction, Darwin (and Wallace) independently came up with the central theory of evolutionary

process: natural selection. Natural selection gives insight in to why organisms are the way that they are. Adaptations are

phenotypic variants that result in the highest fitness among a specified set of variants in a given environment. In reference

to humans, there are many traits that have been selected and adapted for throughout their evolutionary history giving them

the characteristics that they have today. In this paper I will discuss some parts of the human body, which have been found

to be selected for by the evolutionary mechanisms of natural selection, adaptation and mutation.

Natural selection, adaptation, and mutations are three components of the evolutionary process, each one having either

positive or negative effects on the other. What exactly is natural selection? There are many variations of the definition but

most agree that it must include the following concepts: some attribute or trait must vary among biological entities, and there

must be a consistent relationship, within a defined context, between the trait and one or more components of reproductive

success, where "reproductive success" includes both survival and the reproductive processes themselves (Futuyma, 1998).

Charles Darwin's theory of natural selection states "if variations useful to any organic being ever occur, assuredly

individuals thus characterized will have the best chance of being preserved in the struggle for life; and from the strong

principle of inheritance, these will tend to produce offspring similarly characterized." Regardless of how it is defined,

natural selection and its action can have tremendous effects on the members of a population. It is natural selection that

causes adaptation, and these adaptations evolve to ensure the survival of a species.

Evolution, in a very broad sense, is defined as descent with modification and often with diversification (Futuyma, 1998).

Darwin's idea of evolution was that it occurred by descent with modificatio...

... middle of paper ...

...-carbohydrate, high protein

diet. Certain metabolic adaptations were therefore necessary to accommodate the low glucose intake. Many indicate that

the adaptive response to the low carbohydrate intake is insulin resistance(Miller, Colagiuri, 1994).

A study done by J.C. Brand Miller and S. Colagirui proposes that insulin resistance offered a survival and

reproductive advantage during the Ice Ages. This study also proposed that a carnivorous diet would have disadvantaged

reproduction in insulin-sensitive individuals and positively selected for individuals with insulin resistance. Another factor

mentioned was the various environmental factors that contributed to the low carbohydrate intake such as the types of

foods that were available.

The forces of natural selection on the evolutionary processes in humans can have a broad range of effects on the

characteristics of humans. There are no concrete answers to some of the questions proposed in this paper, but time will

soon tell exactly how the evolutionary mechanisms have effected the human race. The human species will continue to

evolve as long as the mechanisms of evolution and environmental factors act upon us.

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Evolution And Evolution Of Evolution Essay

- The earliest is believed to have risen from apes. This species have been quadruples. The man originated from earliest forms. Evolution of man is mainly explained by the theory of evolution this is the evolution theory written by Charles Darwin. This theory is based on facts that early man originated from a common ancestry. Natural selection is mainly through natural selection, life on earth come from most ever primitive structures that lived million years ago and to change with time man continues to evolve to date....   [tags: Human evolution, Human, Charles Darwin, Evolution]

Strong Essays
750 words (2.1 pages)

Evolution And Evolution Of Evolution Essay

- Evolution, what is evolution. Evolution is the process by which different kinds of organisms have changed and adapted from their earlier forms. Evolution relates so closely to biology because biology is the study of life and evolution is how living organisms have adapted to the environment. My goal for this paper is to explore evolution in mammals, the basic theory of evolution, beliefs of evolution, the main contributors of evolution, evolution in humans, evolution in monkeys, things that humans lost from evolution, as well as extinctions....   [tags: Evolution, Charles Darwin, Biology]

Strong Essays
1165 words (3.3 pages)

Evolution And Evolution Of Evolution Essay

- “Evolution is the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth”. Evolution occurs within species and not individuals. Some people believe that evolution theory is a myth and it lacks scientific evidence and others believe that there is supporting evidence. Evolution in the living organisms is believed to have been continuing for the past three thousand million years. Evolution theory is not a modern discovery as it appeared in early writings....   [tags: Evolution, Charles Darwin, Natural selection]

Strong Essays
760 words (2.2 pages)

Evolution And Evolution Of Evolution Essay

- All cultures have origin stories or legends to explain their beginning and the beginning of the world. Some culture stories are based in creationism, and others are based in the science of evolution. Evolution is a widely accepted theory of how species change over time. There are four forces of evolution-- mutation, gene flow, genetic drift, and natural selection-- all of which have an effect on all species undergoing adaptation. From microevolution to macroevolution, change is happening to all the time....   [tags: Evolution, Population genetics, Genetics, Gene]

Strong Essays
1295 words (3.7 pages)

Evolution And Evolution Of Evolution Essay

- In all parts of the the world both past and present, mankind searches for the answers how earth and its complex life forms came to be. Over the years there have been many theories that have surfaced, but the one most popular is the evolution theory. Evolution is taught now in science classrooms all over the world, the concepts based on charles darwin’s theory regarding evolution and natural selection. The science community has accepted evolution has how the earth came into form. however since no one present when the earth was created no one knows for sure, but there is one theory that explains how, why, and when, and that is creation....   [tags: Evolution, Charles Darwin, Natural selection]

Strong Essays
1147 words (3.3 pages)

Evolution And Evolution Of Evolution Essay

- How evolution happens Evolution is change.S Evolution is a certain species changing to become better adapted to their surroundings and in the end this modification causes this species to become a new breed altogether. There was no scientist that understood how evolution works until Charles Darwin and Alfred Russel Wallace (See figure 1) explained it to them. Lots of scientists had realised that plants and animals change with time, as palaeontologists could track the evolution of life in the fossil record....   [tags: Evolution, Natural selection, Charles Darwin]

Strong Essays
1060 words (3 pages)

Essay about Proof of the Existence of Evolution

- Since the publishing of Charles Darwin’s Origin of Species, where the theory of evolution has arisen from, people have debated Creationism versus Evolution. Through supporting facts and statements the theory of evolution will be defended as being more than just a theory, and proven as fact. Evolution as a fact is reinforced through; scientific studies on DNA, genetics and its mutilation, the Fossil Record and the change in earlier species that has been found, and finally the distribution of related species of animals over a broad geographical range....   [tags: evolution]

Strong Essays
625 words (1.8 pages)

Theory of Evolution Essay

- Man could not evolve to any other state, because he was made in the ultimate state. He was made in the image and likeness of the Father so there was no need for evolution; hence, there was no sign of evolution from the beginning. Since sin came into the world, man has been deceived into thinking there is evolution. We are not talking about the theory of evolution that says man started from an amoeba or as an ape and eventually began to walk upright; not that evolution, but evolution in the sense of development....   [tags: Evolution]

Strong Essays
1355 words (3.9 pages)

Primates and Evolution Essay

- What makes a primate a primate. A primate is defined by its many incredible features. A primate is a mammal that has certain characteristics such as: flexible fingers and toes, opposable thumbs, flatter face than other mammals, eyes that face forward and spaced close together, large and complex cerebrum, and social animals. What makes a primate a primate is its characteristics. Some of the physical features primates are identified by is their teeth, snouts, eyes, ears, arms, legs, fingers, and toes....   [tags: Evolution]

Strong Essays
687 words (2 pages)

Creation vs. Evolution Essay

- The purpose of this essay is not to prove “Darwinian” evolution, as the writer would be performing a feat already done by others, but to examine a certain track of thought amongst Creation proponents. Specifically their noting certain improbabilities of evolution's ability to “design.” I'll evade defining the individual concepts because they've all been described before, and far better than I could manage, although I'll point out that micro/macro evolution distinction is largely Creationist lingo, as is the “kind” terminology....   [tags: Evolution]

Strong Essays
1386 words (4 pages)