This theory was based on the consequences of natural catastrophes such as floods and earthquakes wiping out an entire existing population of various organisms. With such extraordinary productivity of living things an effective check upon every species of plant and animal is inevitable.
Due to the advanced knowledge and exposure within the modern world through biology, biochemistry and molecular studies, the concept of evolution is better understood. Therefore, the process of natural selection, comparable to the modern domestic breeding, helps preserve a competitive and advantageous trait enabling the individuals that posses them have a competitive edge and survive in the environment.
Human activities have also led to environmental changes and impacted an evolutionary change on people through natural selection. Elephant is the slowest breeder among animals. Natural selection may act to change a trait in many different ways.
The differences of offsprings from their same species are called variations. Along other mechanisms of evolution such as genetic drift, mutation and migration, natural selection is a fundamental process that is a direct outcome of the interplay between variation, heredity and differential production.
On his own Essay on evolution and natural selection, Darwin notes that natural selection is only possible in the existence of any detectable and inheritable variations. To this date various traits directly point to natural selection. Every plant and animal has a tendency to produce in geometrical progression Malathian concept.
At least for all living organisms, this is a necessary evolutionary mechanism for their advancement. The idea that members of a species compete with each other for resources and that individuals that are better adapted to their lifestyle have a better chance of surviving to reproduce revolutionized the field of evolution, though it was not accepted until several decades after Darwin first proposed it.
The theory does not explain the presence of vestigial organs. Darwin believed in inheritance of acquired characters which has not been proved by genetics.
Directional selection occurs when selection pressures favor one extreme of the trait distribution. In its years life span and 60 years of reproductive capacity, it produces maximum six offsprings. Darwin was not aware of the principles of heredity and hence could not explain satisfactory the causes of such variation.
A functionally advantageous trait for instance camouflage or method of flight developed within a species is inheritable and can be passed on to subsequent generations.
These three parameters can be effectively used to break down the entire process into a simpler and understandable process. At this rate couple of elephants will produce 15 million elephants in years.
Others with harmful variations perish, while variations give rise to new characters, heredity passes them to the next generation. Later, Jean-Baptiste Lamarck confidently brought to limelight another failed attempt at explaining evolution.
It is however important to note that natural selection is not entirely a random process as it has been interpreted. Essay This essay has been submitted by a student. He further concedes that the existence of any complex living organism systems that are not products of variations and modification would render his theory of natural selection resolute and void.
Genetic drift on the other hand is as a result of alteration in frequency of alleles within a species or a population over some time, singly as a result of chance.
The theory explains only the survival of the fittest but not the arrival of the fittest. Selection is disruptive when the average form of the trait is selected against while either extreme is unaffected.
The organisms with useful variations have an upper hand in the struggle for existence and they come out successful.Along other mechanisms of evolution such as genetic drift, mutation and migration, natural selection is a fundamental process that is a direct outcome of the interplay between variation, heredity and differential production.
Natural Selection Essay Examples. 87 total results. An Essay on the Issue of Evolution. words. An Analysis of the Evolution Theory Proposed by Charles Darwin. 2, words. 6 pages. A Study of Natural Selection and Its Work in Human Populations Nowadays.
words. Darwin's Theory of Natural Selection and the Evolution of Animals Essay - Darwin’s theory of natural selection has provided us with the explanations of the processes involved in the changes of species over long periods of time.
Brief Essay on the Darwin’s Theory of Natural Selection with that of Wallace and he was prompted to write a book "Origin of species" in which he was vividly explained "Theory of natural selection".
Popularly his theory is known as "Darwinism". Darwin did not accept the discourteous or mutations as the basis of evolution.
iv. The. In conclusion, it is agreeable that Charles Darwin theory of natural selection is very important in respect to heredity and evolution.
Cite This Work To export a reference to this article please select a referencing stye below. Essay on Evolution: Natural Selection and Human Behavior. important contribution to human behavior. EP posits that behavior is produced by specialized cognitive modules that evolved through natural selection in response to specific adaptive problems faced by our hunter-gatherer ancestors.Download