Charles Darwin’s Theory Essay

Charles Darwin contributed to the field of evolutionary biology were non-constancy of species, branching evolution, event of gradual change in species, and natural selection. Each of his contribution became the intromission of evolutionary biology and can be seen in the wild genuinely commonly. Non-constancy can be observed though variation in the offspring. For example, several(predicate) sized beaks in finches display variation in the species and therefore, non-constancy. This can compositors case change in the gene family of a species over age. umpteen evidence of branching evolution can be seen in the material body of different species like homologies and vestigial structures. In whales, the hip bones are similar to humans which indicates the common ancestry between the two species. stepwise change is displayed by the fossil records of many species.Older fossil records tolerate some small differences from the newer fossil records which can be used to taste gradual ch ange in species over time. These changes occur due to regeneration and are picked out by the natural selection. These mutations accumulate over time and cause the species to look drastically different after many decades. inwrought Selection picks out individuals better suited for the environment and allows them to reproduce and survive on their gene while unsuited individuals die without passing on their gene. Natural selection occurs every time a predator feeds on the weakest, slowest, worst camaflouged, or most un-adapted prey. This allows the gene pool of the species to evolve and cast off undesired genes.Hardy-Weinberg symmetry assumes that the allele frequency stays continuous over time. The equation presumes there is no genetic flow, no mutation, no natural selection, random mating, and a large population. Hardy-Weinberg equation is used as a null hypothesis to determine if evolution is occurring in the species. Punctuated Equilibrium shows a sudden change in a species g ene pool usually due to an environmental disaster after a considerable period of no change in the gene pool. This idea is show by the rise of mammals and the downfall of reptiles and other organisms.ReferencesCampbell, Neil, and Reece, Jane. AP EDITION BIOLOGY. San Francisco Pearson, 2005.