Charles Darwin And Jean Baptiste Lamarck's Theory Of Evolution

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Charles Darwin and Jean – Baptiste Lamarck are two of the earliest scientists known for their distinct concepts of evolution. Although both concepts aimed to explain the complexities of evolution, they each take a different approach. Darwin approached evolution through his views of natural selection, while Lamarck approached it through his model of acquired Characteristics. Darwin’s natural selection referred to survival of the fittest. In organisms, some variations are better adapted to their conditions of life than others, and, on average, the favorable ones are preserved while the others perish (Holmes.,1948). Lamarck was best known for his suggestion that the effects of use and disuse or acquired characteristics can be inherited and …show more content…

However, Darwin’s theory confronted many of the issues in Lamarck’s laws. Both Lamarck and Darwin fully understood the importance of variation, and it is their understandings of variation that fundamentally separate these two evolutionary theorists. However, Darwin actually had relatively little to say about the sources of variation and this was a continuing source of frustration for him. Lacking a model of variation, his focus was mainly on mechanisms of selection, which influence the traits found within a population (Gilady, Hoffmann., 2013). Darwin’s natural selection suggests that biological information is transmitted to next generations merely through DNA sequence, and leaves no room for heritable phenotypic variation acquired during an organism’s lifetime, which contrasts with Lamarck’s visions of evolutionary change (THORÉ.,2015). Lamarck’s example of the giraffe’s neck can easily be used to prove Darwin’s theory correct. While Lamarck’s model is incorrect, the question of how giraffes developed such long necks remained as an important question within the topic of evolution; however it can be explained using the study of DNA and Darwin’s theory of evolution. In this theory, giraffes with longer necks are able to eat more leaves, making them healthier and more liable to produce an offspring. The genes, or DNA, that encodes this long neck are inherited by their offspring, causing their offsprings to also have longer necks. Over years, the number of offsprings with the ‘long neck’ genes outnumbers the offspring with the ‘normal neck’ genes. Eventually, the ‘normal neck’ genes are wiped out because they are unable to reach taller trees and get adequate nutrition, making it difficult for them to survive and

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