Evolution Research Paper

Words: 915
Pages: 4
Open Document
Essay on Evolution

There are many mechanisms that lead to evolutionary change. One of the most important mechanism in evolution is natural selection which is the differential success in the reproduction of different phenotypes resulting from the interaction of organisms with their environment. Natural selection occurs when a environment makes a individual adapt to that certain environment by variations that arise by mutation and genetic recombination. Also it favors certain traits in a individual than other traits so that these favored traits will be presented in the next generation. Another mechanism of evolution is genetic drift. Genetic drift is a random change in a small gene pool due to sampling errors in propagation of alleles or …show more content…
The most precise and powerful method for comparing DNA from two species is DNA sequencing which determines the nucleotide sequences of entire DNA segments that have been cloned by recombinant DNA techniques. This type of comparison tells us exactly how much divergence there has been in the evolution of two genes derived from the same ancestral gene. In 1990, a team of researchers used PCR(polymerase chain reaction) a new technique to compare a short piece of ancient DNA to homologous DNA from a certain plant. Scientists have also compared the proteins between different species such as in bats and dolphins. The oldest type of evidence has been the fossil record which are the historical documents of biology. They are preserved remnants found in sedimentary rocks and are preserved by a process called pretrification. To compare fossils the ages must be determined first by relative dating. Fossils are preserved in strata, rock forms in layers that have different periods of sedimentation which occurs in intervals when the sea level changes. Since each fossils has a different period of sedimentation it is possible to find the age of the fossil. Geologists have also established a time scale with a consistent sequence of geological periods. These periods are: the Precambrian, Paleozoic,
Mesozoic and the Cenozoic eras. With this time scale, geologists have been able to deduce which
Show More

Related Documents: Evolution Research Paper

Essay on Biology Evolution

Evolution Study Guide- 1. The peppered moth used to be mainly while. When the industrial revolution hit in the 1800’sthe air pollution turned the trees dark. The white moths no longer blended in with the trees, the black moths did therefore the white moths then got eaten by the birds. 2. Industrial Melanism was important because… * Evolution is on is an interaction between organisms * Evolution is dependent on genetic change * Shows variation. 3. Gorges Lavier developed…

Words 915 - Pages 4

Evolution: Evolution and Scientist Essay example

Evolution – Pros & Cons Being that there is many debates whether the world, the creatures, and man are created by the process of evolution or creationism, neither as stuck out as one over the other. Neither theories are proved to be correct; there always is a flaw somewhere in the theory. There are many things that are for evolution, and many that are not. Such as fossils are for the theory of evolution, but for organisms to evolve they had to come from a single cell. How was that cell created…

Words 482 - Pages 2

Evolution and Science Essay

SAMPLE PURSUASIVE ESSAY – Take note of the structure and the use of techniques Creationism Should not be Taught in School Science Classes as an Alternative to Evolution. My view is that creationism is not a science, it is a belief. Because it is a belief it has no place being taught as a science, and hence does not belong in a science classroom. I will not only show that creationism is wrong, but also that evolution is the only reasonable explanation for the development of life.…

Words 919 - Pages 4

Essay on Evolution of Music

Danielle Eales English 110 Mon/Wed 10:00-11:15 Essay #2 Due: 9/22/14 Evolution of Music Change is inevitable; regardless of the depth of it. Before we get the chance to take a deep breath, blink our eyes, or finish a sentence, something in the world has changed. Everything from literature to medicine, politics, and to people in general; change allows diversity to emerge and for different types of ideology to take place. Though one of the most apparent subjects to have changed a great deal…

Words 922 - Pages 4

Evolution: Evolution and Intelligent Design Essay

Ben Cook Matthew Brunson ENG 101 10 December 2013 Evolution vs. Intelligent Design “Evolution is a broad, well-tested description of how earth’s present day life-forms arose from common ancestors reaching back to the simplest one celled organisms almost four billion years ago”. (AAAS) The theory of Evolution really became of rapid acceptance when Charles Darwin published a evolutionary theory in his work, “On the Origin of Species”. "Intelligent design" consists of two hypothetical claims…

Words 444 - Pages 2

Evolution: Evolution and New Species Essay

What is evolution? The word evolution can be used in many ways, but in biology, it means descent with modification. In other words, small modifications occur at the genetic level (i.e. in DNA) when a new generation originates from an ancestral population of individuals within a given species. Over time the modifications basically change the characteristics of the whole population. When the population gathers a large number of changes and conditions are right, a new species may appear. Evolution…

Words 654 - Pages 3

Evolution: Evolution and Organisms Essay example

EVOLUTION: The process by which organisms gradually change over time due to different traits inherited from ancestral organisms. It is driven (caused) by differences in both survival and reproductive rates for those organisms—the mechanism that results in evolution of organisms is called Natural Selection.  DNA : Hereditary Material  Gene Pool: common group of genes shared among member of a population  Common Descent: species come from the same group of ancestors.  Fitness: traits or behaviors…

Words 1032 - Pages 5

Evolution: Evolution and Genetic Variation Essay

Evolution refers to a change in the allele frequency of a population. A common misconception is that evolution is "progress" and is working toward some sort of goal. Often the conditions that lead to a certain change in allele frequency are later reversed and the allele frequency returns to its original state. For example, when southern Alberta experiences one of its periodic droughts, plants with a drought resistant phenotype will have an advantage over moisture-loving plants in the same species…

Words 477 - Pages 2

Evolution Essay

Research Paper on Evolution for you! Moreover, evolution does not only influence appearance, but the qualities and abilities of biological species. For example, in order to survive, animals, birds, fish became very fast, possess extremely developed smell, eyesight and especially, their ear is very sensitive and hears a lot. Evolution is the process which lasts millions of years, species change constantly and gradually all the time; the process is active even now. Evolution vs creationism is…

Words 482 - Pages 2

Evolution: Human Evolution and Humans Essays

time also helped humans to a better metabolism and not sweating. The body structure change through time and it had a lot of effect in humans’ evolution. Around six million years ago, the first human ancestors started to move to different places, because of food and survival. The challenges that they faced through time also had its effects in evolution. Climate change and nature has shaped the humans in different ways and different races. Humans made their own way of survival that made…

Words 503 - Pages 3