Introduction
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.
Evolution can happen to any living organism, and is constantly happening. For a species to be “evolved” no major physical characteristics need to be changed, an evolutionary trait can be anything from changed certain cellular size or a drastic change such as the forming of a tail. Certain activities can affect a species long term also. For instance a fish that needs to escape a predator might jump out of the water, over melena of the species doing this they will develop a higher lung capacity.
There are many explanations for why this happens the two most known explanations are Darwin’s theory of evolution and Lamarck’s theory of evolution, Darwin’s theory of evolution focuses on natural selection and the idea traits in organism are constantly changing and that positive traits will outlast those with no traits or bad traits. Lamarckian evolution focuses on an organism being able to change its genetic makeup by repeatedly doing a certain action, once this has been done over many generations the latest generation will look different from the first.
Pleistocene Organism
The procoptodon was a kangaroo predecessor that lived in the Pleistocene era, the procoptodon had many adaptations, including; structural adaptations, such as i...
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... reach. Any number of environmental changes could have caused this to happen, Darwin’s theory states that at least one procoptodon had to have had a small portion of grass in its diet and could digest it, therefore when the shrubs and trees died out a portion of the procoptodons were able to survive on the grass.
Conclusion
In conclusion Darwin’s theory of evolution best describes how the changes like; the two extra-long fingers on each paw, the long horse hoof like extra toe on each foot and the short snout and flat face all developed into an equal finger paw, equal toe length feet, and a longer snout. Darwin’s theory provides a solid reason why the procoptodon developed into the red kangaroo, based on the changing food supply. Compared to Lamarckian theory where the animals could change their digestive system on a genetic level to accept grass as a food source.
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
Any inherited, genetic change in a population which takes place over several generations is defined as Biological evolution. Darwin and Lamarck have contributed majorly to the evolutionary theory. Although Lamarck’s theory was unsupported, he probably provided inspiration to Darwin and many other enthused scientists.
Evolution, also known as descent with modification, is a phrase Darwin used in proposing the evolution of Earth’s many species. Charles Darwin noticed that the descendants of ancestral species were different from the present day forms of species. Darwinism is a theory of biological evolution developed by Charles Darwin who was an English naturalist. He expounded the theory of evolution in his book of the Origin Species in 1859. He expresses that all types of organisms emerge and develop through natural selection, small, acquired traits that expands the individuals of capacity, survival, and reproduction. In this book, Darwin theorized that animals and plants evolve and develop with the aid of the creator through the process of natural selection.
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.
Charles Darwin’s theory was natural selection, the survival of the fittest and the struggle for existence, which had a great impact on selective breeding. Organisms that were well-adapted to their environment had more tendency to survive and reproduce, providing their genetic characteristics for future generations whilst those less-adapted organisms were more likely to be decreased in amount. Charles Darwin’s theory also established that all species of life were related and had descended over time from common ancestors.
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.
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.
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. “Dictionary.com” The first person to supposedly “discover” evolution was Charles Darwin. Charles Darwin was a naturalist. He spent most of his time studying the environment. Most naturalists of his time believed that animals came into existence around the same time the earth did but Darwin believed otherwise. Darwin that believed because the appearance of animals changed depending on their location, they had slowly evolved from other basic animals. He believe that the animals survived due to a process called” natural selection”.
With the studies that Charles Darwin obtained he published his first work, “The Origin of Species.” In this book he explained how for millions of years animals, and plants have evolved to better help their existence. Darwin reasoned that these living things had gradually changed over time to help themselves. The changes that he found seemed to have been during the process of reproduction. The traits which would help them survive became a dominant trait, while the weaker traits became recessive. A good example of what Darwin was trying to explain is shown in giraffes. Long-necked giraffes could reach the food on the trees, while the short-necked giraffes couldn’t. Since long necks helped the giraffes eat, short-necked giraffes died off from hunger. Because of this long-necks became a dominant trait in giraffes. This is what Charles Darwin would later call natural selection.
Anyone with even a moderate background in science has heard of Charles Darwin and his theory of evolution. Since the publishing of his book On the Origin of Species by Means of Natural Selection in 1859, Darwin’s ideas have been debated by everyone from scientists to theologians to ordinary lay-people. Today, though there is still severe opposition, evolution is regarded as fact by most of the scientific community and Darwin’s book remains one of the most influential ever written.
In conclusion, Lamarck’s theory involves adaptations to create new variations, followed by the inheritance of these characteristics, while Darwin’s theory involves random hereditary variation first, followed by the selection of the variation. Genetics has disproven Lamarck’s theory on the basis that characteristics acquired during the lifetime of a parent are not passed onto the offspring. On the other hand, Darwin’s theory failed in explaining why a beneficial change-the loss of functionality of the appendix, for instance- can be passed generation after generation. However, Lamarck and Darwin both believed that life is continuously changing and that organisms change to be better suited to their environment (Mills 2004:119-121).
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)
On Darwin’s trip around the world he found something very interesting on the Galapagos Islands. On the isolated islands he found fourteen species of finches with very similar characteristics but they had some differences in their beaks, diet, body size and habitat. Darwin thought the birds had a common ancestor. He thought that some time back some finches arrived on the islands and the finches with the beaks that suited the islands conditions survived this happened on all the islands. When they had offspring the next generation would inherit the same beak. This is a great example of natural selection which was a contributor to how humans evolved. From this Darwin established his theory of natural selection and how slowly over time creatures...