Exam__4 - Spring 07 1362 Exam 4 WHITE 1. Although primary...

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Page 1 Spring 07 1362 Exam 4 WHITE 1. Although primary producers can capture light (solar) energy to fix CO 2 , they are absolutely dependent upon the _______ to provide them with usable forms of nitrogen and minerals. A) carnivores B) decomposers C) autotrophs D) omnivores Ans: B 2. Species richness has been observed to increase with primary productivity—to a point. At high levels of productivity, species richness decreases. Which of the following explains this phenomenon? A) Competitive exclusion B) Predation C) Herbivory D) Decomposition E) None of the above Ans: A 3. The populations of different species that live in a given region is called a ___________; a(n) ___________ is the term used to describe these groups and the physical environment they live in. A) social group; ecosystem B) trophic level; territory C) community; ecosystem D) community; food web E) trophic level; ecosystem Ans: C 4. The feeding relationships among the species in a community determine the community's A) mortality rate. B) trophic structure. C) species richness. D) biome type. E) biogeographic region. Ans: B Use the following to answer questions 5-7: B C D Number of individuals Time A 5. This graph A) represents a population, at the point indicated by the dashed line (D), which has reached its' carrying capacity. B) represents a population with unlimited growth potential. C) is represented by the equation: N/ t = rN , where r = (b-d) D) A, B, and C are correct. E) Only A and C are correct. Ans: A 6. This population would be more susceptible to the effects of density-independent factors at what point? A) A B) B C) C D) D E) The population would be equally susceptible to such factors at all of these points. Ans: E
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Page 2 7. The consequence(s) of reducing the number of individuals in this population to a level just below B would be to A) lower the carrying capacity of the population. B) bring the population to the range of its' exponential growth rate. C) increase the death rate of the population D) A, B, and C are all possible consequences. Ans: B 8. The following are true concerning altruistic behavior except : A) Altruistic behavior is correlated to the extent of relatedness between the altruist and recipient. B) An altruistic behavior is more likely to be performed by an individual if the one being helped is its' cousin rather than a brother or sister. C) The recipient is provided food, care, and protection as a result of the altruist's behavior. D) The altruist has a chance of being injured or harmed in performing the behavior. E) There are no exceptions, all (A-D) are true statements. Ans: B 9. The major terrestrial biome types are identified by their characteristic _______. A) vegetation B) carnivores C) herbivores D) color E) size Ans: A 10. The benefits lost by an animal that is not able to feed while defending its breeding territory is an example of _______ cost.
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This note was uploaded on 04/14/2008 for the course BIOL 1362 taught by Professor Loeblich during the Spring '08 term at University of Houston.

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Exam__4 - Spring 07 1362 Exam 4 WHITE 1. Although primary...

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