bio.midterm1 question

bio.midterm1 question - (If specilization on particular...

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I was wondering if mutation could not be a potential cause of evolution by itself. This is Question #30 from the exam starting with "Consider a gene…": For Question #30, my thinking was mutation only provided the raw material for evolution. Without natural selection, mutations cannot cause evolution. 30. Which of the following, by itself, it not a potential cause of evolution? a. natural selection b. mutation c. sexual selection d. random mating e. artificial selection answer key: D On Question #32, could B. sexual selection be a reason that some lineages of insects have more species than others? 32. It has been proposed that some lineages of insects have more species than others because of a. specialization on particular host plants b. sexual selection c. genetic drift d. predation by birds e. extinction due to catastrophic events in the past answer key: A
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Unformatted text preview: (If specilization on particular host plants is a reason that some lineages of insects have more species than others, could predation by birds also be a reason?) On Question #34, I understood there were at least two mutations (Glu-Asp and Phe-Leu) but how do we know if they are synonymous or non-synonymous. I chose D. We cannot infer the mutational history of a gene given a protein sequence but the answer is A. There have been at least 2 mutations that resulted in non-synonymous substitutions. 34. Examining the amino acid sequence of a protein foundin 2 closely related species of bats we find: Species 1: Ala-Glu-His-Cys-Phe-Leu-Tyr Species 2: Ala-Asp-His-Cyc-Leu-Leu-Tyr Assuming that we have aligned the sequences properly, what can we say about the accumulation of mutations since these species diverged from the common ancestor?...
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