Why Study the Tree of Life? To watch a video on this topic! By providing a chronicle of past evolutionary events, phylogenetic trees have become central to understanding the process of evolution, and therefore to the interpretation of all biological information. The Tree of Life is of great scientific interest, but does it have immediate practical value? The answer is a definite “Yes”! Phylogenetic comparisons with “model organisms” (such as the chimpanzee, mouse, zebra fish and yeast) are providing major insights into the structure and function of the human genome, knowledge that will enable us to address a wide variety of human disorders. Medical journals routinely publish phylogenetic trees, which have proven to be critical in identifying and tracing the origins of emerging infectious diseases such as HIV, the Ebola and West Nile viruses, anthrax, and influenza. HIV In the case of HIV (the virus responsible for AIDS, now the leading infectious cause of death worldwide), phylogenetic studies have revealed multiple sources of the disease in nonhuman primates and have also helped trace its transmission through human populations. Rabies Rabies, which is transmitted through blood and saliva, is the tenth leading cause of human death from infectious disease. As it spreads from host to host the viral strain accumulates mutations in its genetic material, and from these we can recover its phylogenetic history. Nov 28, 2017 This feature is not available right now. Please try again later. Dec 03, 2017 Bible by Olive Tree is the best free Bible app for reading and studying God’s Holy Word and comes with great translations like the NIV, ESV, KJV, NKJV. Is my study research? The aim of this decision tool is to help you decide whether or not your study is research as defined by the UK Policy Framework for. Learning about trees? This tree unit study is designed to help elementary students learn everything they need to know about trees and photosynthesis! The map below shows a phylogeny of a rabies virus strain that spread across Europe starting in the 1930s. This strain originated in African dogs, but then jumped host species — into the red fox in southern Europe and later into the raccoon dog in north eastern Europe. The tree shows a characteristic “transmission wave” as the virus spread westward across Europe starting in the 1950s. Agriculture Knowledge of phylogenetic relationships also plays a key role in agriculture, especially by identifying the wild relatives of domesticated plants and animals (potatoes from South America, chickens from southeast Asia, wheat from the Middle East), guiding genetic improvements (engineering resistance to drought and pathogens) and locating potential biological control agents. For example, the discovery that the Mexican grass teosinte is the wild ancestor of cultivated maize has led to an understanding of the genes that could enhance desirable key attributes of the cultivated plant.
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