Selection

Natural Selection and Sexual Selection This world is colored by diverse species. Some of them persist but others distinct. It is natural and sexual selections that result in incredible difference. Both are leading to a process of evolution while there still exist differences between two selections. “In mammalian males, sexual selection can have a great effect on behavior and morphology than other forms of natural selection because male reproductive success usually varies much more than female reproductive success” says in Boyd and Silk’s book (2015, p.158). Charles Darwin’s theory has played an important role in both natural selection and sexual selection. Body and Silk (2015, p.5-6) mentioned: “Darwin’s theory of adaptation follows from three…

humans, (Homo sapiens) in the past. However, for the present and the future of humanity, I believe that natural human evolution will not continue, as humans have taken control of their evolution. First, humans are able to artificially alter their physical appearance to be more attractive, causing sexual selection to alter the gene pool less and less. In addition, people are able to remove the pressures which question the fitness of individuals using medical technology. Finally, as genetic…

Beginning at the start of human civilization with the Ancient Egyptians, humans started to deliberately breed dogs to help with everyday tasks. The tasks Egyptians used dogs for included hunting and guarding. Thus, traits for strength and swiftness were selected for breeding so they were strong but fast. This allowed them the ability to catch prey and thieves. This act of choosing certain traits to enhance a dog’s ability to perform a set task is known as artificial selection. Charles Darwin…

One of the key questions asked within the field of evolutionary developmental biology (ev-devo) today is that of how mutation and selection work together to bring about evolutionary changes. Originally thought that the two mechanisms works independently of each other to bring about change through natural selection operating to the extent that it can and that mutations account for anything that selection doesn’t (Livnat. A 2013), this view is now been believed to be incorrect. By exploring the…

Artificial and natural selection have many similarities and differences. These two concepts were both conceived by Charles Darwin. Natural selection is defined as the process where organisms have characteristics that help allow them to adapt to environmental problems, like changes in climate, predators, or competition for food. These organisms tend to survive and reproduce in greater numbers than the other fraction of their species. This guarantees that the prolongation of those…

To understand the origin of whales, it's necessary to have a basic understanding of how natural selection works. Natural selection can change a species in small ways, causing a population to change color or size over the course of several generations. This is called "microevolution." But natural selection is also capable of much more. Given enough time and enough accumulated changes, natural selection can create entirely new species, known as "macroevolution." It can turn dinosaurs into birds,…

With so many variations in populations of species, the struggle of existence results in 'survival of the fittest', a term coined by Herbert Spencer. The survival of fittest is a direct result of the selection and proliferation of only those organisms which were most suitable adapted to the environment and most successful in mating. The major achievement of Darwin was to recognize one of the major factors in adaptation i.e. Natural selection. However Darwin was not clear about the sources of…

In Jones short selection of “The Decent of Men”, he is taking Darwin’s theories about “Of Sexual Selection and Natural Selection” and I would say updating them and not creating something altogether new. The difference that I see is that Jones has new information to add because so much time has passed since Darwin wrote his book. We have learned that the population of men is descending, or is not as favorable as it once was by pure observation. Jones takes Darwin’s idea of the battle of men…

In the mid-1800s, Darwin and Wallace independently took careful observations of species near the South American content. And although both men were independently investigating, there are many overlaps in their observations and perspective in their respective papers – which focus on natural selection. The primary question of Darwin and Wallace’s papers were to investigate the nature of natural selection in various species and document the variation of characteristics amongst individuals in a…

Natural selection as defined by Charles Darwin has exerted a powerful influence on how we perceive our world. This theory holds that favorable characteristics in a species will persist in populations, while disadvantageous traits will be selected against via the death of unfit individuals from environmental pressures, such as predation, decreased availability of resources like nutrients and shelter, and natural processes such as drought; thus only individuals with the most advantageous traits…