This website uses cookies to ensure you have the best experience. Learn more

Evidence Of The Theory Of Evolution

809 words - 3 pages

There is abundant evidence that evolution occurs-that some species change over time, that other species diverge and become one or more new species, and that still other species become extinct. Darwin's theory was that evolution progresses through natural selection. The synthetic theory of evolution combines natural selection with the influence of genetics. These theories, together with the evidence for evolution from population genetics, molecular biology, and comparative anatomy and embryology, propose mechanisms responsible for the evolutionary patterns observed in nature.Population genetics, which emphasizes the extensive genetic variation within populations and recognizes the importance of quantitative characters, was a significant turning point for the theory of evolution. In small populations, there is greater chance for evolution. In all populations, more organisms are born than will survive and reproduce. In a small population, there is an even smaller sample that serves as parents. Such a population is very vulnerable to genetic drift. Genetic drift is the event of charge in the gene pool of a small population due to chance. Reproduction of an individual depends on both fitness and chance. However, small populations, where there is a smaller gene pool, may be more greatly affected by chance because it could greatly reduce the frequency of a particular allele in that population. For example, in a population where there is a smaller gene pool, may be more greatly effected by chance because it could greatly reduce the frequency of a particular allele in that population. For example, in a population where there is only four bugs of which two are spotted (recessive) and two were are solid colored (dominant) and only two reproduce, there is only 25% chance that the two bugs that mate will both be spotted. In this event, the entire next generation would be entirely spotted and the solid-color allele would be eliminated from the gene pool of successive generation. By contrast in a large population, there is usually not a major chance in the allele frequencies from one generation from the next. Genetic drift greatly contributes to evolution because it may reduce genetic variability in a small population (as described in the example above) and increase genetic variability between populations. As a result of chance, two populations may evolve very different allele frequencies. Genetic drift may arise as a result of a population bottleneck or the founder effect. In a population bottleneck, a species undergoes drastic reduction in population size, so that only a few individuals contribute genes to the entire future population of...

Find Another Essay On Evidence of the theory of evolution

The Theory Of Evolution Essay

2859 words - 11 pages . "Fluida" changes the body parts 8. What did Lyell do to influence Darwin? a. Argued that catastrophes had less affect on the earth b. Subtle changes - a view that lead to the theory of uniformity and the theory of evolution 9. What organisms did Darwin base most of his theory of evolution on? a. Finches due to the many different species and how their bills have adapted to their environments 10

The Evolution of Management Theory Essay

3370 words - 13 pages Introduction - The Evolution of Management TheoryDuring the industrial revolution that took place in Western Europe and North America in the 18th century; various machines were built and the economy which was based on manual labor was replaced by machines. Then factories of large scale in the garment sector, automobile sector etc emerged rapidly and the need to increase organizational efficiency and effectiveness has guided the evolution of

The Evolution of Aggression Theory

1245 words - 5 pages control beginning around the 1950s (1). However, because there was a lack of empirical evidence to support lingering past theories about the origins of aggression and how it should be defined, it was difficult to identify a theory which adequately explained this human condition. Consequently, it was then difficult to develop an approach to extinguish this maladaptive behavior in youth until Albert Bandura applied his Social Learning Theory to

What is the evidence for the thory of evolution?

530 words - 2 pages the fact that dinosaurs that lived 150 millions of years ago that suggest that they are related to crocodiles. Also certain fossils have been found that are similar to both reptiles and mammals. This suggests that they were the animals that created the first mammals.Although all of this evidence is not absolute proof, it is still very strong evidence that the theory of evolution is true.

Creation or Evolution: Evidence of the Fossil Record

1645 words - 7 pages Creation or evolution? This is a question that has plagued scientists ever since the age of Charles Darwin, the scientist who first introduced the idea of evolution back in the 1800s. However, as intelligent as Darwin may have been in his attempts to formulate the theory of evolution, the undeniable evidence of the fossil record appears to give the best support to one answer.What is the theory of evolution, one might ask? Today, evolution is the

Evidences of the Theory of Evolution

711 words - 3 pages . There is so much evidence that supports the theory of evolution. “Evidence could be provided from sources as different as ancient fossils and modern genetics labs. It also comes from comparing the anatomy of creatures living today. All creatures with four limbs have the same bone structure in each limb, indicating their descent from a common ancestor. More evidence comes from biogeography. Isolated islands are missing common species found on

The History of Darwin’s Theory of Evolution

1045 words - 4 pages Nothing in biology makes sense except in the light of evolution. (Dobzhanski, 1973) It was during his journey on board the Beagle that Darwin developed his theory of evolution. “On the Origin of Species” (Darwin, 1859) proposed two main principles: evolution really occurs and natural selection is its mechanism. This work published on 24th November 1859 traces a coherent portrait of life bringing together in an orderly manner an

Theory of Evolution: The Evolution of Hox Cluster

961 words - 4 pages Dear Mr. Darwin, In your book The Origin of Species you talked about how natural selection was how evolution took place, yet you did not know how this mechanism was actually involved in evolution. Well you were right and now we know how natural selection plays a part in evolution. Natural selection does play a big part but there are others mechanisms that help shape how an organism evolves. These mechanisms include migration, isolation, genetic

The Evolution of the Cell Theory

915 words - 4 pages The Evolution of the Cell Theory Since the beginning of humanity, science has been a developing topic full of mystery and questions. These questions might be as small as why closet doors close easier during the winter compared to the summer, and as big as how the universe was made. There are numerous topics in science such as chemistry, biology, and physics each of which have their own questions to be answered. They each have their own theories

Theory of Evolution

1960 words - 8 pages scientist were to manipulate the data so that it benefits them, we would reject the work of that scientist who consider him criminal in his work. Is that not what Evolutionist with the support for the theory? Why do they protect the data so much? If evolution is supported, there should be no problem with the general public seeing the evidence. But it doesn’t. Evolutionist talk out of both sides of their mouth. On one side they say that

Darwin's Theory of Evolution

814 words - 3 pages drain resources and that state welfare should be curtailed so that population would level off. If it is not possible to maintain the production of food to satisfy the population, than the population must be kept down to the level of available food.” (Rosenberg, 2009) Charles Darwin’s theory of evolution was that everything in the world was connected in some way. He was also known for the theory of natural selection. In that he said that

Similar Essays

The Theory Of Evolution Essay

1282 words - 5 pages the evolution of life is simply incorrect. Some may claim that there is no proof that the earth is old, but there is no scientific evidence that it is young. There is a lot of conclusive evidence supporting the fact that earth has been here for billions of years. The evidence of the earth being so old is what gave rise to modern theories of natural selection. The major reason that this theory even exists is because the assumption was made that the

The Evolution Of Theory Essay

727 words - 3 pages There is a monkey in your family tree. Whether that is fact or theory, and the difference, Stephen Jay Gould explains in, “Evolution as Fact and Theory”, which appeared in the May 1981 issue of Discover Magazine. Mr. Gould was described by the New York Times as, “one of the most influential evolutionary biologists of the 20th century” (Yoon). He wants to show how the creationist's have built their argument against evolution on sand, and the

The Theory Of Evolution Essay

3076 words - 12 pages increase.The elimination of the unfit, or the 'survival of the fittest,' is known asNatural Selection because it is nature that discards or favors aarticular being. Evolution takes place only when natural selectionoperates on apopulation of organisms containing diverse inheritable forms.HISTORYPierre Louis Moreau de Maupertuis (1698-1759) was the firsttopropose a general theory of evolution. He said that hereditary material,consisting of particles, was

The Theory Of Evolution Essay

2533 words - 10 pages Man, and 40 years later admitted itwas a gibbon, and he had with held parts of other bones to preclude identification. Recent studies ofNeanderthal man show that, like Cro-Magnon and Heidelberg man, he was NOT stooped and apelike, butwas affected by rickets and arthritis. They are men, and artists depiction of them as "ape-like" is unfoundedand not supported by the evidence(Rensberger,1981). To support the evolution theory, it is necessary