Essay Title: 

biology

April 1, 2016 | Author: | Posted in history, west european studies

Question 1 : Theoretic models of the biological evolution and the related discussions devoted to this fundamental concept of the modern science are often centered on the investigation of the specific biological and genetic mechanisms of natural selection and of other factors that have enabled evolution as such and have lead , and continue to do so , to the emergence of the variety of species as we know them . Of course , homo sapiens is perhaps the most interesting species from the evolutionary point of view . In this regard , it is interesting to try to predict [banner_entry_middle]

what key innovation , which is a modification in structure or function that permits a species to exploit the environment in a more efficient or novel way compared to the ancestral species , have humans developed or yet may to develop . It must be pointed out from the outset that modern humans are virtually identical genetically to their early ancestors of approximately 100 thousand years ago . Those insignificant changes that have been occurring since the dawn of homo sapiens , such as the possible continuation of the growth of the human brain`s size (The Associated Press , 2006 , do not affect our ability for the adaptive radiation in new environments . But what has the most immediate relation to the adaptive radiation of humans is our technology , which for the last millennia has been the key innovation driving profound changes in our life style and the penetration in new environments . Thus , in the distant future technology may enable humans to live in previously hostile environments either by means of adaptation to them , or maybe even by transforming them into comfortable ones

Question 2 : Since the 1960s , the traditional approach to the estimation by means of fossils record analysis of the time when organisms developed and evolutionary diverged was augmented by molecular genetic studies that uncovered workings of the so-called molecular clocks , which are very helpful for the investigation of the evolutionary history as both an auxiliary and the primary method . The reason why this widely discussed tool is considered reliable is that available evidence suggests a correlation of rates of evolution among similar evolutionary lineages , which in its turn can be explained by the similar factors of influence

Sources

The Associated Press (2005 “Study Suggests Human Brains Still Evolving . Live

Science , 2006 . 23 December , 2006 http /www .livescience .com /humanbiology

ap_050908_brain .html

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