Hi, Student 1,
Thank you for your eye-opening post, as it is well discussed and ideas articulately well organized. Indeed, the exists a significant difference between both artificial and natural selection as while the former involves facilitating the evolution of farm stock and hence hybrid stock, the latter involves a natural adaptation to the environment. Moreover, the examples used to explain both concepts, such as chicken and the giraffe, respectively, offer the reader the ability to understand the idea using common animals critically ( Lenski, 2017). Artificial selection has evolved over the years, as depicted in your example regarding chicken as they have proven to be larger in size today as compared to the past ( Garland Jr, Zhao & Saltzman, 2016) . However, do you find this to be beneficial to both the environment and us as human beings? In conclusion, the process of natural selection allows for the survival of different species of living organisms based on the fact that each is specifically adapted to its surroundings and natural habitat.
Hi, Student 2,
Thank you for your educational post. The concept of natural selection has been critically discussed with relevant and specific examples, such as that of the giraffe ( Williams, 2018) . This has provided a new lens through which one can consider natural selection as a slow process that has occurred over the years, with only the strong surviving while the weaklings died. Indeed, further research supports your text with regards to the evolution of the giraffe and the ability of the species to adapt to an ever-changing environment. However, the text has provided limited information regarding artificial selection. According to Kessner and Novembre (2015) , this is the concept of identifying the best breed of species and hence manipulating them to achieve desired results, which not only improves human life but contributes significantly to the environment. In conclusion, an example of this approach is thoroughbred racehorses whose DNA was manipulated to achieve the desired breed of horses specifically for racing competitions.
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References
Garland Jr, T., Zhao, M., & Saltzman, W. (2016). Hormones and the evolution of complex traits: insights from the artificial selection on behavior. Integrative and Comparative Biology , 56 (2), 207-224.
Kessner, D., & Novembre, J. (2015). Power analysis of artificial selection experiments using efficient whole-genome simulation of quantitative traits. Genetics , 199 (4), 991-1005.
Lenski, R. E. (2017). What is an adaptation by natural selection? Perspectives of an experimental microbiologist. PLoS genetics , 13 (4), e1006668.
Williams, G. C. (2018). Adaptation and natural selection: A critique of some current evolutionary thought (Vol. 61). Princeton university press.
