Evolution Research Paper Example | Topics and Well Written Essays - 1000 words

Evolution - Research Paper useNatural selection refers to a process in which species compete and struggle for their excerpt according to the especial(a) resources and conditions of their natural environment with diametrical adaptive abilities. As individuals in a population are non the same due to difference in inherited characteristics, nature only selects those individuals that are best suited to the environmental conditions, and thus rest of the population dies over time (Starr et al., 2012, p. 263, 264, 265). As all the offspring in a population acquire characteristics from their ancestors, produced more than nature can support and have contrary generative characteristics, only those organisms will survive that are better adapted to the living conditions. This means that organisms with higher duplicate ability will survive due to higher probability of their descendants to survive, and others will eventually sound extinct due to less survival rate of their offspring wit h the passage of time. Since environmental conditions are different from place to place, there will be variation in characteristics of species at different locations. Darwin conclude that populations extending over large areas or through with(predicate) migration might have been isolated resulting in variation of their characteristics according to alter environments. Over long periods of time, they may have diverged or evolved into different species. For instance, Darwin found that finches on the Galapagos Islands were more like to each other than to finches of the mainland. He also noticed that some varieties were only existent on the archipelago islands. So, he proposed that all species might have descended from a common ancestor and increase in number of species occurred through evolutionary natural selection over time rather than special creation (Strickberger, 2005, p. 22, 23). Darwin and other naturalists believed that variations among individuals of a species were due to mixing of traits from both the male and female. He was not aware of the heredity mechanism and different traits were regarded to be the result of blending of characteristics through generations over time. However, the concept of blending inheritance failed to describe the survival of variety as they descended through generations with time. It also failed to describe the maintenance of specific characteristics in varieties and how new species would put out through blending. It was 1866, when Gregor Mendel published his experimental findings on garden peas. To experiment with pure seeds, he selected a ego pollinating plant. He experimented with garden peas that were different from each other in many characteristics such as their flowers were either red or white, had green or yellow seeds, and tall or dwarf. After cross-breeding generations having different characteristics, he observed that descendants from each cross possessed characteristics of only one of the parents and blending did not happen. Mendel concluded that instead of blending of certain fluids, heredity from parents was passed on to offspring through independent discrete units, particles or factoren, which were later termed as genes. The characteristic that appeared in a descendant after cross breeding was termed