Essay On Charles Darwin's Theory Of Natural Selection

Decent Essays
Charles Darwin
Charles Darwin modestly brought something new to the old philosophy – a plausible mechanism called ‘natural selection’. “Natural selection acts to preserve and accumulate minor advantages of genetic mutations” (Darwin, 1952). If the food source in a certain area was condensed, animals would ought to compete with others to obtain a sufficient amount of food. Certain individuals in the species could have been born with a unique attribute, for example, big, strong teeth. By having these teeth, the specie would be able to eat a wider variety of food than others in the species with smaller, weaker teeth. It is evident that the animals with the larger teeth would survive, whilst the others would die of extreme starvation. When the
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His theory involved two ideas. The first was that a characteristic that is used repetitively by an organism becomes sturdier, whereas one that isn’t used often eventually disappears. The second idea was that any feature of an organism that is improved by usage in numerous occasions will be passed down to the next generation of organisms. For example, if a giraffe is the offspring being evolved over years, Lamarck predicted the following. He considered that a giraffe stretches its neck to reach food, high up in the trees. The giraffe’s neck gets longer because of how it is used on a day to day basis. Whilst now having a longer neck the giraffe’s offspring will now inherit its new characteristics. However, it is now known today that in various cases this form of inheritance cannot occur. Lamarck’s theory cannot account for all observations made about life on Earth. “For instance, his theory implies that all organisms would gradually become complex, and simple organisms disappear” (BBC, 2014). Conversely, Darwin’s theory accounts for the sustained existence of the simple organisms. Darwin relied on typically the same evidence for evolution that Lamarck did, although made vastly different assumptions in correlation to Lamarck. Lamarck’s theory differs from contemporary evolutionary concepts. Lamarck perceived evolution of being a procedure in which animals increase…show more content…
Wallace developed a theory, through these remarks, about how species of plants and animals progressively alter through a procedure known as ‘natural selection’. “His formulation of the theory of evolution by natural selection, which predates Charles Darwin’s published contributions, was his most outstanding legacy, but it was just one of the many controversial issues he studied and wrote about during his lifetime” (Britannica, 2015). Through his eight-year expedition to Indonesia, Wallace developed some of his most vital ides about natural selection – by analyzing wildlife and collecting specimens. This vast archipelago’s tremendous variety of plant and animal life can be confronted by a few locations on earth. By 1855, Wallace determined that all living organisms evolve – not figuring out how until a few years later. He was now certain that animals evolve by adapting to their home environment. For instance, Wallace used Maleos as evidence for his theory in that they have adapted faultlessly to their environment, by even using geology to survive. Maleos use geothermal energy to hatch their eggs – as an alternative of sitting on them like hens would. These unique birds dig into the terrain, which is preheated from the surrounding hot springs. Unlike regular birds, Maleos can sense where the temperature is higher or lower; using this to lay their
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