Practise Questions Jan. 2012 Key

Frequent e any of these 25 any trait that improves an

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Unformatted text preview: n is occurring a. neutral b. stabilizing c. disruptive d. directional e. none of these 24. Both ends of a range of variation are selected during _________selection a. disruptive b. directional c. stabilizing d. frequent e. any of these 25. Any trait that improves an individual’s fitness is called a. a degree of fitness. b. a negative trait c. a neutral trait. d. an adaptive trait. e. none of these. 26. Which of the following is not an observation or inference on which natural selection is based? a. There is heritable variation among individuals. b. Poorly adapted individuals never produce offspring c. Species produce more offspring than the environment can support. PRACTISE QUESTIONS BIOL 1001 W2012 Key d. Individuals whose characteristics are best suited to the environment generally leave more offspring than those whose characteristics are less suited. e. Only a fraction of the offspring produced by an individual may survive. 27. Natural selection changes allele frequencies because some _____ survive and reproduce more successfully than others. a. Alleles b. Loci c. Gene pools d. Species e. Individuals 28. Sparrows with average-sized wings survive severe storms better than those with longer or shorter wings, illustrating a. The bottleneck effect b. Stabilizing selection c. Frequency-dependent selection d. Neutral variation e. Disruptive selection 29. Which of the following has the highest Darwinian fitness? a. A personal trainer who works out at the gym everyday. b. A scientist who devotes herself to science & wins the Nobel Prize. c. A sperm donor who anonymously fathers 52 children. d. A woman who home schools her two children. 30. Which of the following is the best example of a heritable variation? a. Skin cancer b. Amputation c. Red hair d. Love for music 31. Sometimes the most abundant colour form of an animal is preyed upon more extensively than less common forms. This illustrates the phenomenon of a. stabilizing selection. b. directional selection. c. disruptive selection. d....
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This test prep was uploaded on 02/20/2014 for the course BIOLOGY 1001 taught by Professor Tamarakelly during the Spring '13 term at York University.

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