How do you calculate the adjusted amount of energy that is available to organisms that are one trophic level above producers?(1 point)
Responses
net primary productivity plus gross primary productivity
net primary productivity plus gross primary productivity
net primary productivity plus amount of organic material used in respiration
net primary productivity plus amount of organic material used in respiration
gross primary productivity minus net primary productivity
gross primary productivity minus net primary productivity
gross primary productivity minus amount of organic material used in respiration
gross primary productivity minus amount of organic material used in respiration
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The correct answer is: gross primary productivity minus net primary productivity.
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Question
Methylmercury biomagnifies in an ecosystem, meaning its concentration __________ as it moves through each higher trophic level.(1 point)
Responses

equalizes
equalizes

increases
increases

decreases
decreases

does not change
does not change
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The correct answer is: increases.
Scientists are looking to determine the primary productivity of a lake by analyzing its oxygen net primary productivity. How are scientists able to measure how much oxygen is used during a plant’s cellular respiration processes?(1 point)
Responses
by observing cellular respiration under the absence of light
by observing cellular respiration under the absence of light
by observing cellular respiration under bright light conditions
by observing cellular respiration under bright light conditions
by observing cellular respiration by studying biomagnification
by observing cellular respiration by studying biomagnification
by observing cellular respiration only when photosynthesis occurs
by observing cellular respiration only when photosynthesis occurs
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The correct answer is: by observing cellular respiration under the absence of light.
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Question
Energy transfer is inefficient between trophic levels because(1 point)
Responses

molecules are fully digested from each trophic level.
molecules are fully digested from each trophic level.

dead organisms and waste are recycled throughout the trophic levels.
dead organisms and waste are recycled throughout the trophic levels.

organisms within a trophic level are fully consumed.
organisms within a trophic level are fully consumed.

all organisms within a trophic level die.
all organisms within a trophic level die.
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The correct answer is: molecules are fully digested from each trophic level.
Primary productivity is defined as(1 point)
Responses
the process where green plants and some other organisms convert light energy into chemical energy using carbon dioxide and water.
the process where green plants and some other organisms convert light energy into chemical energy using carbon dioxide and water.
the rate that plants and other photosynthetic organisms produce organic compounds.
the rate that plants and other photosynthetic organisms produce organic compounds.
the adjusted amount of energy in an ecosystem due to energy use by organisms for respiration.
the adjusted amount of energy in an ecosystem due to energy use by organisms for respiration.
the overall amount of energy captured by plants and other photosynthetic organisms by the chloroplast.
the overall amount of energy captured by plants and other photosynthetic organisms by the chloroplast.
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