Charles Darwin's Theory Of Natural Selection

Evolution is a theory that gives origin to Earth’s living things. The theory of evolution is considered as one of the fundamental keystones of biology. Even though it is only considered a theory, in biology theories are supported by much experimental evidence and express ideas that are certain. Evolution accounts for life’s unity and diversity. The hypothesis of evolution was first introduced by Jean Baptiste Lamarck in 1809. Lamarck proposed how life changes over time. His principles included the inheritance of acquired characteristics and the innate tendency to increase perfections. His principles were incorrect but definitely started the big discussion of evolution. Between 1831 and 1836, Charles Darwin took a voyage around the world including

Darwin’s theory of evolution gave evidence of descent with modification from common ancestors and natural selection, which is the mechanism of descent with modification. With Darwin’s theory of evolution, evolution is redefined as descent modification with the change in the frequency of alleles over time. Natural selection is defined as individuals with certain traits that tend to survive and reproduce at higher rates because of the traits. Adaptations arise through the process of natural selection. Adaptations are inherited characteristics of the organism that help to enhance their survival and reproduction. With the help of Darwin and the understanding of how evolution and the different processes of evolution work, we are able to give correlations in the relationship between dinosaurs and birds and possibly come to the conclusion if today’s birds are related to extinct

With the lands drifting apart, small waterways were being created and dinosaurs were able to spread out amongst the continents. Dinosaurs’ diversity began to rapidly spread with the extinction of mammal-like reptiles. With the Jurassic period’s climate, larger dinosaurs were able to evolve. The prosauropods, as mentioned in the Triassic period continued to give evidence of evolution, with the steady increase in size. For example, the 10 m long sauropod Vulcanodon shows numerous changes to its skeletal structure in order to accommodate the increase of weight. The Vulcanodon was the pioneer for great evolution among sauropods during the Jurassic period. Another sauropod named Brachiosaurus, evolved to have a very long neck and elongated forelimbs in order to reach high vegetation, while the other sauropods adapted to lower vegetation. Large ornithischian herbivores, like the Scelidosaurus, evolved a turtle-like beak for vegetation of lower plants and primitive iguanodonts, like the Camprosaurus, also showed adaptations for low grazing. The largest carnivore of the Jurassic period was the double-crested Dilophosaurus evolved from the Coelophysis. (Evolution of