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Natural Selection Vs Genetic Drift

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1.Evolution is a changing process of all life forms, a trial that makes life adapting its living environment for survival. For my perspective, the difference between natural selection and genetic drift is the way of selecting genes. Natural selective is depending on outer environment. In the contrast, Genetic drift happens more randomly during evolution time. For the way of natural selection’s is a kind of adaption for living. As natural environment continually changing, some of organism’s genes may more appropriately adapt living environment. Therefore, only can creatures which obtain these “better” genes survive during the period of evolution. However, genetic drift reduces the diversity of creature’s genes. When a amount of life forms have
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Evolution, in common terms, is descent through genetic inheritance, with change in physical and biological characteristics. Evolutionary theory attempts to explain why we see so many species in world that seem so diverse and yet, have enough similarities that imply a common origin. There are various mechanisms by which evolution occurs, including natural selection, artificial selection, gene drift, etc., but in the end, evolution is process by which every single species that exists today, was derived from the last universal ancestor. This perpetual system of change and advancement, shapes the both the biotic and abiotic aspects of the environment, and results in the creation and advancement of the complex communities that inhabit the biosphere.

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All organisms have specific adaptations which help survival. There are three categories of adaptations; structural, physiological, and behavioural. Over generations an organism might become so different from its ancestors that if they were put together they wouldn’t be capable of producing fertile offspring, creating a new subspecies. A similar thing may happen if one population is divided, then over time adapt to new surroundings. This process is called natural selection and can be found throughout any organism’s history, but can only occur if there is variation within a species.

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Organisms can evolve to enhance their ability to catch prey, or flee predators. Coevolution occurs in a predator-prey relationship when the prey evolves in response to pressures exerted by its predator. The predator then evolves in response to the changes in the prey (or vice versa). Inheritable adaptive traits evolve through natural selection, the process by which organisms that have developed favorable traits are capable of surviving and reproducing at greater rates, thus passing their adaptive traits to their offspring. Birds and caterpillars have a predator-prey

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1. Imagine that a professor tells you that genetic drift is only relevant in small populations. Discuss one way in which this statement is wrong, and also one way in which is it at least partially correct. Make a convincing case for why the professor’s view needs to be amended. Genetic drift can occur in both large and small populations.

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An example of natural selection is the change in coloration of some species. For example, Peppered moths which the most common being the dark colored ones over the white one because as where dark moths are able to camouflage in the dark colored lichen-trees from predators white ones can’t and are easily detected by predators.

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Evolution is the process of change over time. It can be split in two questions, how did something living come from something that was not alive? And, how did things that were already living turn into other living things? Natural selection is when the “breeder: is the environment. This belief of natural selection came from Charles Darwin.

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Well-documented records of introduction for non-native species provide a remarkable opportunity to understand how populations evolve in a new environment. Commonly, species introduced into a new environment came from a few individuals, which is translated mostly in a low genetic diversity due to that they have just part of the genetic diversity of the original population (Frankham 2005; Roman and Darling 2007). Additionally, the process of random genetic drift as it is predicted by the genetic theory is stronger in small populations (Frankham 1996; Roman and Darling 2007). Like further consequence related to genetic drift during the process of introduction, frequently is followed by a strong selection by the new environment what can drive an

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Natural selection is about the struggle for survival of the fittest biological survival and the phenomenon to be eliminated. Organisms produce offspring, which is the basis of a species’ survival. They produce more than that can actually survive. Sometimes the environmental factors kill the offspring while other times it’s the disease or short of food. This makes every organism struggle to survive, which leads to the competitions of organisms against each other.

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