Darwin's Origin Of Species Analysis

1196 Words 5 Pages
Darwin 's theory of evolution is a widely held concept that all life is related through the descent of a common ancestor with modification. It presumes the development of life from non-life and how complex creatures evolve over time from more simplistic ancestors by a process called natural selection. According to Darwin’s observations and inferences, natural selection arises from heritable variations (i.e size, shape, behavior, color) among population members, high fertility rate, differences in survival and reproduction in a given environment, and the accumulation of favorable traits through unequal production from generation to generation. Eventually, these changes in traits, rate of development, mating, and survival variations confer …show more content…
Biogeography, which is a study that deals with the geographical dispersal of organisms and species, enabled Darwin to discover creatures that roughly have the same body plan despite the species’s adaption to different environments, food resources and climatic conditions. An example would include Darwin’s discovery of three similar forms of the mockingbird on different islands or the thirteen species finches during his trip to the Galapagos. Nonetheless, these “closely allied” species inhabit neighboring spaces on unlike areas due to inheritance and the descension of a common ancestor. On the other hand, paleontology is the scientific study of geologic life through plant and animal fossils. As the fossils beneath the geologic strata revealed the habitation of the species, Darwin also noticed that similar species are found adjacent to one another in the strata. He identified how a specie that has survived for millions of years is replaced by a similar, yet non identical, specie. This type of specie is seen in North America, when a horse like creature called the Hyracotherium was replaced by the Orohippus and later on was replaced by many other creatures. Eventually all of these animals disappeared after some time, with the exception of the Dinohippus, which was lastly replaced by the …show more content…
It is a simple explanation for biological diversity and the notable similarities between various forms of life, differentiations in populations, and the embryonic development of an organism. Without the knowledge of evolution, advancements in science related fields such as medicine, agriculture, and biomedical research would be difficult. An example includes the “resurrection” of ancestral proteins through a conduction of experiments. Researchers at the University of Chicago Medical Institute were finally successful in showing the “biological complexity” of how a tiny mutation (change in the DNA sequence) about a billion years ago could cause proteins “to switch from its primordial role as an enzyme to a new function that became essential to organize multicellular structures.” This experiment essentially explained how the history of life on Earth relates to the evolution of multicellular animals from single-celled ancestors. Therefore, it is because of evolution that allowed the discovery of new ancestral protein functions through various experiments in multicellularity and complex life. This is why Theodosius Dobzhansky believes evolution is the cornerstone of biology because it describes the understanding of both living and extinct

Related Documents