Biology 1M03 Final Exam Practice Questions And Answers

Biology 1M03 Final Exam Practice Questions And Answers Interpret this statement: Extinct fossil species are typically succeeded by similar living species - ANS Extinct and living forms represent ancestors and descendants Which is an example of developmental homology a) gene content b) similar organismal structures c)vestigial traits d) similar embryonic traits - ANS d) Which is not one of Darwin's 4 Postulates: a) Individuals in a population vary in their traits b) These differences are not heritable; they are not passed onto offspring c) In each generation, many more offspring are produced than can survive d) Individuals with certain heritable traits are more likely to survive and reproduce - ANS b) Explanation: These differences ARE heritable and ARE passed onto offspring Evolution by natural selection occurs when... - ANS heritable variation leads to differential reproductive success Individuals with certain heritable traits are more likely to survive and reproduce. Is this statement true? - ANS Yes Which of the following are evidence for evolution? (many may apply) i) Fossils ii)Vestigial traits iii)Transitional Forms iv)Non-transitional forms - ANS i), ii), iii) The bacterium Mycobacterium tuberculosis causes tuberculosis (TB) Rifampin is an antibiotic used as treatment DNA from rifampin-resistant bacteria has a single point mutation in the rpoB gene Rifampin works by interfering with bacterial RNA polymerase, but the mutation prevents this During antibiotic therapy with rifampin, bacteria cells with normal RNA polymerase grow more slowly or die, but those with mutant RNA polymerase proliferate. Did natural selection occur? What happened? - ANS Natural selection occurred and allowed for the survival and reproduction of antibiotic-resistant bacteria Is this statement true or false: Evolution is goal directed - ANS False, evolution is not goal directed Which is not an example of a fitness trade off? a) Brain size