Well-adapted individuals are likely to leave more offspring than their less well … natural selection Sources of genetic variation: 1. duplica ticn 2. mdtalion ing organisms, there is another way in which genetic variation occurs. In other words, struggle for existence results in survival of the fittest which means that natural selection tends to favour those organisms which are most fit to survive with the reproductive age in a particular environment and to produce offspring. Natural selection is based on several key principles: • Overproduction- Populations tend to produce more offspring than can possibly survive. As he wrote in Natural Selection (p. 187): “In many of these cases, the term used by Sir C. Lyell of ‘equilibrium in the number of species’ is the more correct but to my mind it expresses far too much quiescence. Most people in the general population can at least explain that Natural Selection is something that is also called "Survival of the Fittest". Natural selection is one of the four basic premises of evolutionary theory, alongside mutation, migration and genetic drift. This is a process leading to evolution. It’s part of a family of insects called Phylliidae, all of whom are leaf mimics: they’re camouflaged to look like leaves. Natural selection is basically the survival of the fittest where animals that can thrive in their biome will successfully breed and pass on their genes; while animals who struggle to survive … Artificial selection. Evolution . Natural Selection Examples… -natural selection and how the fittest survive and reproduce. … A brief treatment of natural selection follows. Natural selection and evolution Genetic variation, as well as changes in the environment, cause characteristics of organisms to change over time. This is the currently selected item. 3. In nature, there is a struggle to survive-more offspring are produced than can survive with limited resources 2. Know the following-know the effect of these on genetic variation, fitness, understand population size: Genetic drift- Founder effect- Bottleneck Effect- Gene flow How do human activities affect diversity? What Darwin called ‘the war of nature’ took many forms. Although the majority of penguin species live in temperate climates, some of the penguins we are most familiar with live in the extreme conditions of Antarctica.These flippered, flightless birds provide a wonderful example of multiple evolutionary adaptations.. Wolves and lions and jackals have developed hunting strategies suitable for their packs and tuned to their potential prey. I understand the difference between natural selection and selective breeding. "Can we doubt … that … "As more individuals are produced than can possibly survive, there must in every case be a struggle for existence, either one individual with another of the same species, or with the individuals of distinct species, or with the physical conditions of life." The proliferation of antibiotic-resistant bacteria is a major medical problem. Natural Selection is likely a cornerstone of the Origin of Life. Natural selection is the outcome of selection pressures and drives evolution: as favorable mutations accumulate, organisms evolve into new species. Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. A trait that helps a population survive (Polar bear's white fur helps them hide from prey in the snow). In developing the theory of evolution by natural selection, Wallace and Darwin both went beyond simple adaptation by explaining how organisms adapt and evolve. 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