Where Did We Come From?
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Problem 1
What observations did Darwin make on the Galápagos Islands that helped convince him that evolution occurs? a. the existence of animals that did not fit into Linnaeus's classification system; b. the similarities and differences among cacti and tortoises on the different islands; c. the presence of species he had seen on other tropical islands far from the Galápagos; d. the radioactive age of the rocks of the islands; e. fossils of human ancestorsProblem 2
Define artificial selection, and compare and contrast it with natural selection.Problem 3
Describe three ways that evolution can occur via genetic drift.Problem 4
Add labels to the figure that follows, which illustrates how Mycobacterium tuberculosis evolves when it is exposed to an antibiotic.
Problem 5
The theory of common descent states that all modern organisms . a. can change in response to environmental change; b. descended from a single common ancestor; c. descended from one of many ancestors that originally arose on Earth; d. have not evolved; e. can be arranged in a hierarchy from 'least evolved' to 'most evolved'Problem 6
The DNA sequence for the same gene found in several species of mammals . a. is identical among all species; b. is equally different between all pairs of mammal species; c. is more similar between closely related species than between distantly related species; d. provides evidence for the hypothesis of common descent; e. more than one of the above is correctProblem 7
Marsupial mammals give birth to young that complete their development in a pouch on the mother's abdomen. All the native mammals of Australia are marsupials, while these types of mammals are absent or uncommon on other continents. This observation is an example of a.developmental evidence for evolution; b. biogeographic evidence for evolution; c. genetic evidence for evolution; d. fossil evidence for evolution; e. not useful evidence for evolutionProblem 8
Even though marsupial mammals give birth to live young, an eggshell forms briefly early in their development. This is evidence that a.marsupials share a common ancestor with some egg-laying species; b. marsupials are not really mammals; c. all animals arose from a common ancestor; d. marsupial mammals were separately created by God; e. the fossil record of marsupial mammals is incorrectProblem 9
A species of crayfish that lives in caves produces eyestalks like its above-ground relatives, but has no eyes. Eyestalks in cave-dwelling crayfish are thus . a. an evolutionary error; b. a dominant mutation; c. biogeographical evidence of evolution; d. a vestigial trait; e. evidence that evolutionary theory may be incorrectProblem 10
Which of the following taxonomic levels contains organisms that share the most recent common ancestor? a. family; b. order; c. phylum; d. genus; e. class
