The Four Forces of Evolution If we were to think back thousands of years ago to how things were or how things looked, they would be drastically different than how they appear now. Primates, insects, plants, resources, and lifestyles are all very different than they used to be. Over time they have been steadily changing and adapting to their surroundings. This process of changing is called evolution, discovered by Charles Darwin (Haviland, Prins, Walrath, McBride 2015 Pgs.32-34). With such a large number of all living things, it would be far too difficult to categorize them all together. To solve this problem Carolus Linnaeus created a way to classify the different living things. His system was called Systema Naturae, but it is now more modernly
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Natural selection in a way weeds out the less favored traits. It perfects the populations ' genes so that certain species can adapt to the environmental surroundings. Because natural selection gradually changes genes, over a long time span it can make large changes, like the formation of new species (Pg. 44). All four of these forces cause variation in populations, gradually changing them over time either by random or on purpose to perfect the gene. This variation is what keeps populations changing and evolving. Without variation, no populations or species would ever improve. These four factors and the variation that they all provide are essential to changing, adapting, evolving, and improving species. Finally, speciation is the process of forming new species (Pg 46). This is possible because of the four forces of evolution occurring over long lengths of time. Certain species and populations are reproductively isolated meaning the cannot interbreed and make a new species that way. But, over time species can eventually change into a new species, it just cannot happen in one generation from parent to offspring. Isolation of the population can also prevent certain things like gene flow and random mutations from affecting another population (Pg
Natural selection in a way weeds out the less favored traits. It perfects the populations ' genes so that certain species can adapt to the environmental surroundings. Because natural selection gradually changes genes, over a long time span it can make large changes, like the formation of new species (Pg. 44). All four of these forces cause variation in populations, gradually changing them over time either by random or on purpose to perfect the gene. This variation is what keeps populations changing and evolving. Without variation, no populations or species would ever improve. These four factors and the variation that they all provide are essential to changing, adapting, evolving, and improving species. Finally, speciation is the process of forming new species (Pg 46). This is possible because of the four forces of evolution occurring over long lengths of time. Certain species and populations are reproductively isolated meaning the cannot interbreed and make a new species that way. But, over time species can eventually change into a new species, it just cannot happen in one generation from parent to offspring. Isolation of the population can also prevent certain things like gene flow and random mutations from affecting another population (Pg