Exam 3: Biodiversity and Evolution

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Without mutations biological evolution cannot happen.

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Populations of organisms living in aquatic life zones may be limited by

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Briefly explain why coastal zones have a higher net primary productivity than abyssal zones.

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A change in the genetic composition of an individual in a population is known as

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Freshwater systems provide all of the following ecological services except

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Selective breeding is a method of artificial selection.

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Name three (3)major human impacts on each of the following biomes: deserts,grasslands,forests,and mountains.

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Natural selection affects environmental conditions on populations to increase their survival rate.

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When local environmental conditions change,species may become extinct through background extinction.

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"Survival of the fittest" refers to an organism's strength in beating out competitors for survival.

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Major harmful human activities to freshwater systems include all but which one?

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Biomes are not uniformly distributed because of discontinuities in the distribution of resources and human influence.

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  Marine life zones: a.Coastal zone. d.Abyssal zone. b.Euphotic zone. e.Estuarine zone. c.Bathyal zone. -In a deep,temperate zone lake,the profundal zone is similar to which marine life zone in terms of depth and temperature stratification? Marine life zones: a.Coastal zone. d.Abyssal zone. b.Euphotic zone. e.Estuarine zone. c.Bathyal zone. -In a deep,temperate zone lake,the profundal zone is similar to which marine life zone in terms of depth and temperature stratification?

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____________________ is determined by environmental factors including temperature,sunlight,dissolved oxygen,and available nutrients.

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Among deserts,grasslands,forests,and mountains,the common human impact that negatively affects all four biomes is

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____________________ facilitates one species developing into two through mutation and natural selection.

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____________________ is necessary to protect streams and rivers from excessive input of nutrients.

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The number or variety of terrestrial and aquatic ecosystems in an area is called

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Energy flow and matter cycling are part of

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____________________ are classified according to the predominant vegetation and characterized by adaptations of organisms to that particular environment.

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