5 Written Questions
5 Matching Questions
- Which of the following must exist in a population before natural selection can act upon that population?
- In the mid-1900s, the Soviet geneticist Lysenko exposed winter wheat plants to ever-colder temperatures, collected their seeds, and then exposed the seedlings to ever-colder temperatures. He repeated his attempts over the course of decades in an attempt to evolve cold-tolerant winter wheat. Lysenko's attempts in this regard were most in agreement with the ideas of
- In evolutionary terms, the more closely related two different organisms are, the
- Which of the following events, as described here, is most in agreement with the idea of catastrophism?
- Darwin had initially expected the living plants of temperate South America to resemble those of temperate Europe, but he was surprised to find that they more closely resembled the plants of tropical South America. The biological explanation for this observation is most properly associated with the field of
- a d. the demise of the dinosaurs, and various other groups, by the impact of a large extraterrestrial body with Earth
- b c. Lamarck.
- c a. genetic variation among individuals
- d c. more recently they shared a common ancestor.
- e e. biogeography.
5 Multiple Choice Questions
- d. Well-adapted individuals leave more offspring, and thus contribute more to the gene pool, than poorly adapted individuals.
- b. Lamarckism.
- 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.
- a. Characteristics acquired during an organism's life are generally not passed on through genes.
- e. The interaction of organisms with their environment is important in the evolutionary process.
5 True/False Questions
If the HMS Beagle had completely bypassed the Galapagos Islands, Darwin would have had a much poorer understanding of → b. the ability of populations to undergo modification as they adapt to a particular environment.
Which of the following represents an idea Darwin took from the writings of Thomas Malthus? → e. individuals must adapt to their environment.
Natural selection is based on all of the following except → e. individuals must adapt to their environment.
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? → e. A, B, and C
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.