Biology 191 Final Exam Review 100% Correct!

During a study session about evolution, one of your fellow students remarks, "The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result." Which statement is most likely to be helpful in correcting this student's misconception? - ANSWERCharacteristics acquired during an organism's life are generally not passed on through genes. Charles Darwin was the first person to propose - ANSWERa mechanism for evolution that was supported by evidence Which of these conditions should completely prevent the occurrence of a natural selection in a population over time? - ANSWERAll variation between individuals is due only to environmental factors Natural selection is based on all the following except - ANSWERindividuals adapt to their environments and thereby, evolove. Given a population that contains genetic variation, what is the correct sequence of the following events, under the influence of the natural selection? 1. well-adapted individuals leave more offspring than do poorly adapted individuals. 2. A change occurs in the environment 3. Genetic frequencies within the population change. 4. Poorly adapted individuals have decreased survivorship. - ANSWER2-4-1-3 The roles that humans play in artificial selection is to - ANSWERchoose which organisms breed and which do not DDT was once considered a ʺsilver bulletʺ that would permanently eradicate insect pests. Today, instead, DDT is largely useless against many insects. Which of these would have been required for this pest eradication effort to be successful in the long run? - ANSWERNone of the individual insects should have processed genomes that made them resistant to DDT. Which of the following pairs are the best examples of homologous structures? - ANSWERbones in the bat wing and bones in the human forelimb If two modern organisms are distantly related in an evolutionary sense, then one should expect that - ANSWERthey should share fewer homologous structures than two more