Practise Questions Jan. 2012 Key

How would you describe these relationships a the

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Unformatted text preview: ong the arm. How would you describe these relationships? a. The forelimb skeletons of birds and bats are homologous, as are the wings. b. The forelimb skeletons of birds and bats are due to convergent evolution, whereas the wings are homologous. c. The forelimb skeletons of birds and bats are homologous, whereas the wings are due to convergent evolution. d. The forelimb skeletons of birds and bats are due to convergent evolution, as are the wings. 5. Which of the following is the best modern definition of evolution? a. descent without modification b. change in allele frequencies in a population over time c. survival of the fittest d. inheritance of acquired characters 6. How did Hutton & Lyell’s ideas influence Darwin’s thinking about evolution? Gradual accumulation of small changes over long periods of (geologic) time can lead to very big changes. The same processes that act today acted in the past. 7. Which of the following observations helped Darwin shape his concept of descent with modification? a. Species diversity declines farther from the equator. b. Fewer species live on islands than on nearest continents. c. Birds can be found on islands located farther from the mainland than the birds’ maximum nonstop flight distance. d. South American temperate plants are more similar to tropical plants of South America than to the temperate plants of Europe. e. Earthquakes reshape life by causing mass extinctions. PRACTISE QUESTIONS BIOL 1001 W2012 Key 8. Darwin described evolution with the phrase “descent with modification.” What did he mean? a. Evolution takes a long time – it isn’t an instantaneous process. b. Evolution is not a “special” process – it’s a natural phenomenon that is going on today. c. Closely related species are similar at the genetic, developmental & structural levels. d. Populations living today are related (genetically) to populations that lived in the past, but they are...
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