What is evolution and how does it work? Evolution is the theory of how one form of life changes into another form. Evolution also is the change of a population’s inherited traits from generation to generation. Evolution helps to explain why an animal, human, and plant looks the way it does and acts the way it does; it gives an explanation of the history of life. Genes come in many varieties and the evolution helps to make it happen. Mutation, natural selection, genetic drift, and gene flow: the four forces that make the evolution work.
Mutation happens when the DNA gene gets changed, moves, or is damaged. When this happens it causes the genetic message to be carried by that gene to be different. This process can occur in somatic cells. The somatic cells are all the cells that are a living organism except the reproductive cells, meaning the body. For example, the skin cells on your legs are and will not be passed on to ones offsprings. In addition those leg cells will not effect the evolution. Another occurrence is called gametic mutations, which is in a woman's eggs and or in a man's sperm. These are cells that are and can be passed on to ones offsprings, and they are the essentials for the evolution. There are three effects mutation causes to a species. Species can only takes on one of the three. The three effects are bad, neutral, and good. Having a bad mutation can cause one to have a harder time being able to survive. Having a neutral mutation will not change or help one to survive. Having a good mutation will help one to survive and have a better chance of survival. However, mutation is random in the evolution, and provides raw material for natural selection, genetic drift, and gene flow...
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...he genetic differences making more of a variation but it does this process slowly.
Evolution is a on going process and the evolution is made up of many different processes. It allows species to become what they are, how they act, and what they will become. It also allows species to be able to survive. It produces new and different species through ancestral populations of organisms and moves them to new population. Both natural selection and genetic drift decrease genetic variation. If they were the only mechanisms of evolution, populations would eventually become homogeneous and further evolution would be impossible. There are, however, mechanisms that replace variation depleted by selection and drift (Colby).
Work Cited
Colby, Chris. "An Introduction to Evolutionary Biology" Web. 28 August 2015.
http://www.skepticfiles.org/evolut/evolutfa.htm
Evolution is the theory that all living forms came from ancient ancestors and is the natural process to improve a species chance of survival. Through a series of mutations, genetic drift, migration, and natural selection today’s descendants show an amazing amount of similarities and diversity. Evolution on a small scale is called microevolution, an example being the
Evolution is described, as being the change that occurs on a genetic level when a new generation spouts from an ancestral population. Change is destined to happen. That is why in the science of biology the word evolution means descent with modification. Through various factors such as the temperature of the environment, humidity, and altitude a species will adapt to survive and will eventually pass on genetic traits that help the species next generation survive.
What is evolution? Evolution in modern terms is fairly easy to understand. Evolution is the theory that life on earth began with a single celled organism that lived more that 3.5 billion years ago that slowly evolved into many diverse creatures over time. When you break down this theory into sections you get 6 factors: evolution, gradualism, speciation, common ancestry, natural selection and nonselective mechanisms of evolutionary change.
Mutation is a change in the organism's DNA. This change causes the gene pool too to change in an individual. It is rare, but it can have a cumulative effect over time. Mutations are uncommon but the source to all real new changes, but overall the new alleles rely on natural selection and genetic drift. If Drew Fish had a mutation that gave it legs and it began to mate with a member of the population it will be introducing a new gene to the population gene pool. Natural selection can cause change because in reproduction in which preferred Drew Fish mate can cause an increase in numbers of homozygous individuals in the population. Populations in a species consist of different genetic makeups, some of them are more successful at leaving offspring than
Evolution in general, is a hard concept to grasp. There are multiple factors that effect the outcome a species, for example: genetics, nurture, nature, and the environment all play an important role. It was once said that species do not survive due to the fact that they are the strongest or the most intelligent, but because that species is the most responsive to change.
What is evolution? Evolution is a change in the traits of living organisms over generations. Since the development of modern genetics in the 1940s, evolution has been defined more specifically as a change in the frequency of alleles in a population from one generation to the next. In other fields evolution is used more generally to refer to any process of change over time.
Natural selection is simple yet complex process that allows species adapt to its environment. Natural selection guides evolution by “sifting out” favorable traits that increase survival for the species. Natural selection is driven by reproductive success. If a species can reproduce and its offspring survive than any traits in its genotype that assisted in its survival will be passed on from generation to generation and ensure that the species will live on. Around the time the Theory of Evolution was suggested, society was very religious and very pressed on the Theory of Creation, so the publication of Darwin’s The Origin of Species by Means of Natural Selection caused a lot of controversy. Darwin gave the world strong evidence that natural selection and evolution played a major role in the development of the species that we see today. Of course natural selection is not the only process driving evolution. In order for natural selection to happen, the species has to have genetic variation. Genetic variation happens because of mutations and recombination of genes. Other processes that contribute are gene flow and genetic
Evolution is something that is talked about frequently throughout people’s education, it is probably first brought to people’s attention in middle school more than likely. “The science of biology is very broad in scope because there is a tremendous diversity of life on earth… the source of diversity is evolution, the process of gradual change during which new species arise from older species” (OpenStax). According to OpenStax, “the term for where new species arise from older species is adaptation.” Which makes sense because, people always hear the most fittest are the ones to survive while the weak die. This where the term natural selection comes into place, according to The Recluant Biologist, “not all members are the same – within any population there is a variation in the physical characteristics of the individuals… Darwin reasoned that if some of these variants provide the individual with a slight edge over their competitors in the
The four forces of evolution are mutation, natural selection, genetic drift, and gene flow. Mutation is a change in one’s genetic code – happening in either point mutation or frameshift mutation. A point mutation is one base being substituted for another, and a frameshift mutation is when a base molecule is either deleted or inserted, causing the base to shift and a different amino acid to be produced. Natural selection is when characteristics that help insure one’s survival are passed from generation to generation. Natural selection helps generations produce or gain skills that will help insure their survival. Genetic drift is a random change in a populations alleles – the change in variability is slowed down, or when the offspring becomes
Natural selection is the process by which random modifications (mutations), related to a distinct individual’s chance of survival by adapting to its environment (food, predators, environmental features), are selected by nature in a total logical way (lecture). Basically, natural selection functions like this: the individuals among a community with the most advantageous characteristics regard to the survival and reproduction rate will spread on these inherent genetic traits to their offspring (Futuyma, 2004). Over time, these traits will become more frequent in the genetic basis of future generations and eventually all the living species within a population will gain those features (lecture). There are three preconditions for natural selection to exist (lecture). The first one is variation. It simply means that there will be changes in the DNA and those modifications are the reason why we vary in a population. The second one is differential reproductive success. This condition suggests that some individuals have more offspring than others and it generally has to do with competition between species. The third one is heredity which supports that we inherited the genetic basis of our creators, half of each parent. In brief, natural selection is broadly associated with the capacity of species to adapt in their environment and occurs only through three primordial preconditions: variation, differential reproduction and
Evolution is the gradual change in an organisms gene pool over time, basically evolution is described in any change in the genetic makeup of an organism. The easiest way to show this is by stating examples of low level evolution as it has been observed. The best know case of this kind happened in England during the industrial evolution. There were two varieties of the English Peppered moth before the revolution, a light and a dark colored moth. The dark moth was almost nonexistent, as it was easy for predators to catch on the light colored trees. As the industrial revolution progressed, the amount of pollution in the air turned the trees a soot color, and as a result the light moths were easy for predators to spot. The light colored peppered moth all but died out, and was on the verge of extinction while the dark colored moth was thriving. In the last several decades the pollution in England has dropped and white moth is making a come back, and the dark moth is heading back towards oblivion. (Harter)
In science today we can see that every species has diversity amongst them. We know that these differences are caused by many different factors. Two of those factors are mutation and natural selection. These two different processes have a major effect on a how species will continue to reproduce and thrive. Both of these methods play a major role in evolution dating back to over a million years ago.
Evolution is the scientific theory of the development of living organisms during their period on earth. The theory takes into consideration the biological processes of natural selection, mutation, symbiosis, gene transfer and genetic drift.
Another mechanism is a hereditable type of evolution is mutations. Mutations are alterations to a gene. Mutation can be harmful, beneficial or neutral. Mutations are the origin of the source of genetic diversity (9).Mutation that are harmful, hinders the chances of the organism chances of survival and are likely to die along with the mutations. Beneficial mutations increase the chances of the individual to survive in its environment, and they will be more likely to reproduce and pass on the gene to future generations (9).
Evolution is the idea of a living organism adapting or mutating to gain beneficial physiological, psychological and structural features. The genetic makeup of all living things is constantly changing, due to DNA replication errors or outside factors, some of these changes impact drastically on the organism changing it for the better or worse. Typically when an organisms genetic code is changed for the better and it reproduces and outlives its unchanged counterparts this process is called evolution.