BIOL 143 Exam 3 (ch13, 18, 28) Chapter 13 1) Natural selection can be defined as ______. A) the evolution of a population of organisms B) a process in which changes in gene frequencies result from evolution C) the production of more offspring than can survive in a given environment D) a process in which organisms with certain inherited traits are more likely to survive and reproduce than individuals with other traits 2) What did Darwin find in South America that suggested that the Andes mountains had been gradually lifted up over millions of years? A) bird fossils at the top of mountains in Argentina B) dinosaur bones in the Amazon basin C) marine snail fossils high up in the Andes mountains D) impressions of ocean waves at the top of a mountain 3) Which of the following is a component of the fossil record? A) the distribution of murid rodents in Australia and Asia B) the similarity of the forelimbs of cats and bats C) molecular sequences D) bones of extinct whales 4) The oldest known fossils are from about ______ years ago. A) 3.5 billion B) 6,000 C) 4.0 million D) 1.0 billion 5) Homology is evidence of ______. A) biogeography B) convergent evolution C) natural selection D) common ancestry 6) Which of the following is a population? A) the termites infesting your house along with the microorganisms living in their guts B) all of the termites that have ever lived C) all organisms living in your house D) the termites infesting your house 7) Which of the following is likely to be the result of polygenic inheritance? A) freckles B) an extra finger C) human height D) ABO blood type 8) Genetic drift is the result of ______. A) natural selection B) chance C) a large gene pool D) environmental variation 9) Gene flow is accomplished by ______. A) migration B) sexual recombination C) mutation D) natural selection 10) What does evolutionary fitness measure? A) physical health B) longevity C) relative reproductive success D) population size 11) Which of the following is an example of directional selection? A) The birth weight at which newborn humans are most likely to survive and the average weight of newborn humans are about the same. B) There is an increase in antibiotic-resistant strains of bacteria. C) There is an increase in the number of different breeds of dog. D) Garter snakes with different coloration patterns behave differently when threatened. 12) Which of the following is an example of disruptive selection? A) The birth weight at which newborn humans are most likely to survive and the average weight of newborn humans are about the same. B) There is an increase in antibiotic-resistant strains of bacteria. C) There is an increase in the number of different breeds of dog. D) Garter snakes with different coloration patterns behave differently when threatened. 13) Which of the following is most likely to decrease genetic variation? A) directional selection B) mutation C) stabilizing ...