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22.1 Test

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5 Written Questions

5 Matching Questions

  1. A biologist studied a population of squirrels for 15 years. During that time, the population was never fewer than 30 squirrels and never more than 45. Her data showed that over half of the squirrels born did not survive to reproduce, because of competition for food and predation. In a single generation, 90% of the squirrels that were born lived to reproduce, and the population increased to 80. What inferences might you make about this population?
  2. Which statement about natural selection is most correct?
  3. During drought years on the Galapagos, small, easily eaten seeds become rare leaving only large, hard-cased seeds that only birds with large beaks can eat. If a drought persists for several years, then what should one expect to result from natural selection?
  4. Charles Darwin was the first to propose
  5. If the HMS Beagle had completely bypassed the Galapagos Islands, Darwin would have had a much poorer understanding of
  1. a e. A, B, and C
  2. b d. More small-beaked birds dying than the larger-beaked birds. The offspring produced in subsequent generations have a higher percentage of birds with large beaks.
  3. c d. a mechanism for evolution that was supported by evidence.
  4. d d. Well-adapted individuals leave more offspring, and thus contribute more to the gene pool, than poorly adapted individuals.
  5. e b. the ability of populations to undergo modification as they adapt to a particular environment.

5 Multiple Choice Questions

  1. c. more recently they shared a common ancestor.
  2. b. Lamarckism.
  3. d. the demise of the dinosaurs, and various other groups, by the impact of a large extraterrestrial body with Earth
  4. e. A and B only
  5. a. Characteristics acquired during an organism's life are generally not passed on through genes.

5 True/False Questions

  1. Which of the following must exist in a population before natural selection can act upon that population?e. individuals must adapt to their environment.


  2. In a hypothetical environment, fishes called pike-cichlids are visual predators of algae-eating fish, i.e., they locate their prey by sight. If a population of algae eaters experiences predation pressure from pike-cichlids, which of the following would least likely be observed in the algae-eater population over the course of many generations?c. Female algae eaters may become larger, bearing broods composed of more, and larger, young.


  3. Catastrophism, meaning the regular occurrence of geological or meteorological disturbances (catastrophes), was Cuvier's attempt to explain the existence ofe. individuals must adapt to their environment.


  4. Both Darwin's and Lamarck's ideas regarding evolution suggest which of the following?e. individuals must adapt to their environment.


  5. Which of the following statements is not an inference of natural selection?b. Populations tend to increase at a faster rate than their food supply.


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