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Download Biology Quiz 2 Answers and explanations Note there were two forms
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Biology Quiz 2 Answers and explanations Note there were two forms of the quiz, which were indicated in the lower left hand corner. This was done to discourage basing your answer on the person sitting next to you. Q1. Mutation is the ultimate source of all genetic variation. Selection does not increase genetic variation in a population, it decreases it. Q2. Kingdom, Phylum, Class, Order, Family, Genus, Species (Recall the silly saying; Kings Play Chess On Fat Guys’ Stomachs) Q3. If a farmer applied a weed killer continuously for 25 years, two things could happen; 1) the weeds could become resistant, therefore the product would no longer be effective, and 2) genetic diversity of the weeds could decrease after continued selection. This was an analogous example to bacteria and selection by antibiotics. A third possibility exists (but not an answer on the quiz); no evolution towards chemical resistance could develop and the product remains effective. Q4. The two wrong answers were Eukaryotic bacteria and Prokaryotic bacteria. These are not names of taxa at the Kingdom level. Q5. Natural selection is not the only force leading to evolution of populations. Genetic drift (chance) can lead to evolution (changes in gene frequencies in a population). I gave you an example in class about a population being divided in two by a meandering river. Genetic drift was also in your reading assignment. Besides genetic drift, artificial selection also can lead to evolution of populations.