Short Answer Questions 96) In a few sentences, explain how the evolution of the

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Short Answer Questions 96) In a few sentences, explain how the evolution of the eye contradicts the principle of maximum parsimony 97) What are the development genes (name of the group) and what kinds of changes in them can affect major changes in body form? 98) Describe briefly three of the most important periods of time in the evolution of life on the plan, giving examples of organisms that existed during that time and the major events that led to their demise. Why is the date 65.5 MB so crucial to the development of Life and existence on Earth? 99) In the video watched in class, it was stated that a person had been found who had an innate immunity to AIDS and HIV. Explain from an evolutionary perspective how this might or might not be so. SONY Web Button: One touch web access wiout ful boot up F5 F10 F11 F12 Prt Sc Pause SysRq Break ak Ba 5 6 7 8 9 0

Explanation / Answer

96) The principle of parsimony describes the simplest explanations that is the most likely to be correct. Biologists use the principle of parsimony when drawing phylogenetic trees. To do this, one must first determine which species in a group are most closely related to each other.

In contrast, an example is the eyen which contradicts maximum parsimony. A common argument in the favour of creationism is eye. A half developed eye would serve no function, so natural selection post a question on the evolution of functional eye in a step-wise manner. Natural selection favoured the organs that allow detection of light, even if it did not provide full vision. In snails and segmented worms, light-sense cells spread across the body surface can difference between light and dark.

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