BIO 1300 Exam Questions and Answers All Correct

BIO 1300 Exam Questions and Answers All Correct Similar habitats often place similar selection pressures on different species. This often leads to unrelated species having features in common. What is this an example of? A. Vestigial structures B. Convergent evolution C. Homologous traits D. Artificial selection - Answer-Convergent evolution If a person wanted to produce dogs with extremely thick coats for surviving in cold climates, he could do this by only allowing dogs with the thickest coats to breed. What would this be an example of? a.Heterozygote advantage b.Natural selection c.Adaptive radiation d.Stabilizing selection e.Artificial selection - Answer-Artificial selection Vestigial structures are: - Answer-Non-functional structures left over from an organism's evolutionary past When comparing amino acid sequences of proteins found in several different species, more closely related species should have - a.A higher degree of divergence b.Much more similar sequences c.Fewer differences in amino acid sequence* d.Completely different sequences e.The is no relationship - Answer-Much more similar sequences and Fewer differences in amino acid sequence Which of the following would be an example of a vestigial structure? a.The common body form of sharks and dolphins b.The structure of an invertebrates eye when compared to a vertebrate eye c.The common pattern of bones in the forelimbs of mammals d.The non functional remains of the pelvic girdle found in modern whales e.The multiple evolution of wings across many taxa - Answer-The non functional remains of the pelvic girdle found in modern whales Since the 1970's researchers have been tracking change beak depth of one particular species of finch on one of the Galapagos Islands. What did their data demonstrate? a.There has been no change in beak depth, at least nothing worth writing home about b.Beak depth is determined by the amount of nutrition a juvenile bird receives, it is largely an environmental trait c.During dry years birds with large beaks have the advantage and the average beak size increases in the next generation, the trend is reversed during wet years d.Natural selection has little or no influence on the beak shape e.None of the above - Answer-During dry years birds with large beaks have the advantage and the average beak size increases in the next generation, the trend is reversed during wet years In a population of snails the individuals with the thickest shells survive and reproduce more than those with thinner shells. Assuming shell thickness is a heritable trait what should happen to the mean shell thickness in a population of snails over time a.Increase b.Decrease c.Remain the same d.There would be no pattern - Answer-Increase Which of the following would NOT be a good method for sorting out the evolutionary relationships between a parrot, gorilla, hippopotamus, starfish, and catfish? a.Comparing the skeletal anatomy b.Examining the habitat in which these organism live c.Looking at embryos for common developmental patterns d.Comparing the nucleotide sequence divergence of selected genes e.All of the above would provide useful information - Answer-All of the above would provide useful information What is evolution? On what scales can it occur? - Answer-It's the idea of change in characteristics that are heritable. It can occur with microevolution: which is a small scale that changes in a single gene in population, and macroevolution: which is a larger scale that has formation of new species/groups of species