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ECOLOGY PRACTICE QUESTIONS (Serie # 2) 1) Which of the following statements is consistent with the principle of competitive exclusion? A) Bird species generally do not compete for nesting sites. B) The density of one competing species will have a positive impact on the population growth of the other competing species. C) Two species with the same fundamental niche will exclude other competing species. D) Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species. E) Evolution tends to increase competition between related species. 2) According to the competitive exclusion principle, two species cannot continue to occupy the same A) habitat. B) niche. C) territory. D) range. E) biome. 3) The sum total of an organism's interaction with the biotic and abiotic resources of its environment is called its A) habitat. B) logistic growth. C) biotic potential. D) carrying capacity. E) ecological niche. Use the following diagram of Joseph Connell's study of barnacle distribution in Scotland to answer the following two questions. Figure 54.1 4) Which of the following is the most logical conclusion about the distribution of the two species of barnacle, Chthamalus and Balanus ?
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A) Chthamalus and Balanus compete for the same types of food. B) Balanus is less able to resist desiccation than Chthamalus . C) Chthamalus prefers higher temperatures than Balanus . D) Balanus is a better osmoregulator that Chthamalus . E) Chthamalus is preyed upon more than Balanus by birds because of its size. 5) Which of the following is a good description of an ecological niche? A) the "address" of an organism B) synonymous with an organism's specific trophic level C) how an organism uses the biotic and abiotic resources in the community D) the organism's role in recycling nutrients in its habitat E) the interactions of the organism with other members of the community 6) Two barnacles, Balanus and Chthamalus , can both survive on the lower rocks just above the low-tide line on the Scottish coast, but only Balanus actually does so, with Chthamalus adopting a higher zone. Which of the following best accounts for this niche separation? A) competitive exclusion B) predation of Chthamalus by Balanus C) cooperative displacement D) primary succession E) mutualism 7) A species of fish is found to require a certain water temperature, a particular oxygen content of the water, a particular depth, a rocky substrate on the bottom, and a variety of nutrients in the form of microscopic plants and animals to thrive. These requirements describe its A) dimensional profile. B) ecological niche. C) prime habitat. D) resource partition. E) home base. 8) Which of the following best describes resource partitioning?
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