EXAM 4 V1 - Name: PS ID#: BIOL 1362 - Introduction to...

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V.1 Name: PS ID#: BIOL 1362 - Introduction to Biological Science – EXAM 4 Dr. Ana Medrano 04/29/2009 1) Systems that include all organisms that live together in the same area are called: a) ecosystems. b) biomes. c) communities. d) ecotones. e) None of the above 2) Which of the following would be considered a biotic factor in the environment? a) The presence of parasites b) The pH c) The salinity d) The temperature e) All of the above 3) We refer to the long-term average atmospheric conditions of a region as its: a) weather. b) biotic factor. c) biome. d) community. e) climate. 4) It tends to rain more in the mountains than in adjacent lowlands because: a) as air travels up mountains, it cools. Cool air holds less moisture than warm air does, and the excess moisture is dropped as rain. b) as air travels up the mountains, it is compressed. The mountains squeeze the water out of the air, and the water falls as rain. c) mountains are often in the clouds. d) as air moves down mountains, it expands and does not form clouds, so no rainfall occurs. e) the rainfall is equal in both mountains and lowlands; however, because the rain has farther to travel from clouds to the lowlands, more evaporates before reaching the ground in the lowlands. 5) Biomes are defined by the: a) types of animals that live in them. b) amount of precipitation they receive. c) growth forms of the plants that dwell in them. d) biospheres that they enclose. e) None of the above 6) Species that are found only within a certain region are said to be: a) biotonic. b) biological. c) endangered. d) biogeographical. e) endemic. 7) Which of the following was not an advance that led to contemporary biogeography? a) The acceptance of the phenomenon of continental drift b) The development of the theory of island biogeography c) The development of molecular biology d) The development of phylogenetic taxonomy e) All of the above were advances leading to contemporary biogeography.
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V.1 8) According to the theory of island biogeography, equilibrium is reached on an island: a) when the first colonists arrive. b) when the first species goes extinct. c) when the rate of arrival equals the rate of extinction. d) when the species pool is very large. e) that is small. 9) The appearance of a physical barrier that splits the range of a species is called: a) a biogeographic event. b) a biome. c) the Wallace line. d) a vicariant event. e) continental drift. 10) For the terrestrial fauna in the Americas, the formation of the Central American land bridge 4 million years ago led to: a) vicariant events. b) continental drift. c) biotic interchange. d) the formation of a biome. e) None of the above 11) Which of the following can be barriers to dispersal for marine organisms? a)
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EXAM 4 V1 - Name: PS ID#: BIOL 1362 - Introduction to...

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