Exam 3: Ecosystems - What Are They and How Do They Work

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Despite its low net primary productivity (NPP),the open ocean produces more of the earth's biomass per year than any other ecosystem or life zone because ____.​

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Bacteria in soil convert ammonia and ammonium ions to ___________________.

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Of the following water cycle processes,the one working against gravity is​

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Water exists as a liquid over a wide range of temperatures because of the lack of attractive forces between its molecules.

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​An organism can be described as a tertiary consumer if it eats ____.

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Water has the ability to filter out wavelengths of the sun's ultraviolet radiation that would harm some aquatic organisms.

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Carnivores such as tigers,hawks and killer whales that feed on the flesh of other carnivores are known as _______________ consumers.​

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Human activities have affected the sulfur cycle primarily by ____.​

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A deer is both a primary consumer and in the second trophic level.​

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Why is it that most top predators (e.g.,lions,tigers,bears,and wolves)have extremely large territories and are relatively rare?

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Food chains and food webs show how producers,consumers,and decomposers are connected to one another as chemical energy flows through different ____ in an ecosystem.​

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Net primary productivity (NPP)is the rate at which producers use photosynthesis to produce and store chemical energy minus ____.​

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Ecology is the study of how organisms can survive independently of one another by their dependence on matter and energy.

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Compare the roles of bacteria in the nitrogen and phosphorus cycles.

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As solar energy interacts with carbon dioxide,water vapor,and several other gases in the troposphere,it warms the troposphere- a process known as the ____________________.

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____________________ is the rate at which an ecosystem's producers (usually plants)convert solar energy into chemical energy stored in compounds found in their tissues,not accounting for the use of chemical energy through aerobic respiration.

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The troposphere and stratosphere are layers of the ____________________.

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Human activities have affected the sulfur cycle through the burning of sulfur-containing coal and oil.​

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Plants utilize a portion of their gross primary productivity (GPP)for respiration.

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Pronghorn antelope live in the high desert of the Great Basin in the western U.S.Which of the following items are possible abiotic factors that an antelope has to contend with?​

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