NR 103 Exam 4 Questions and Answers
Graded A+
Ecosystem - Correct answer-all components of an ecological system biotic and
abiotic that influence the flow of energy and elements
Carbon Inputs - Correct answer-photosynthesis by plants provides the carbon and
energy that drive most biological processes in ecosystems
biomass - Correct answer-mass or organism per unit area
primary productivity - Correct answer-rate at which biomass is produced per unit
area by plants
Gross Primary Productivity (GPP) - Correct answer-total fixation of energy by
photosynthesis
net primary productivity (NPP) - Correct answer-GPP - respiration (represents the
biomass gained by the plant)
Leaf Area Index (LAI) - Correct answer-measure of leaf area per unit area
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, secondary production - Correct answer-consumption of organic matter by
heterotrophs
big fierce animals are rare - Correct answer-they require more energy
net secondary production - Correct answer-Ingestion - Respiration - Egestion
resilience - Correct answer-ability to recover quickly from disturbance
resistance - Correct answer-ability to absorb disturbances with little change
primary succession - Correct answer-changes that occur to a habitat following a
disturbance that kill virtually all organisms
secondary succession - Correct answer-pattern of recolonization following a
disturbance in which only some of the organisms are killed
linear succession - Correct answer-theory that succession progresses through
various stages that include a climax stage ending with a stable end point
traits of early succession competitor - Correct answer--high reproductive rates
-disperse long distances
-germinate and grow quickly in poor soils
-successful when competitors are absent
-serotiny
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Graded A+
Ecosystem - Correct answer-all components of an ecological system biotic and
abiotic that influence the flow of energy and elements
Carbon Inputs - Correct answer-photosynthesis by plants provides the carbon and
energy that drive most biological processes in ecosystems
biomass - Correct answer-mass or organism per unit area
primary productivity - Correct answer-rate at which biomass is produced per unit
area by plants
Gross Primary Productivity (GPP) - Correct answer-total fixation of energy by
photosynthesis
net primary productivity (NPP) - Correct answer-GPP - respiration (represents the
biomass gained by the plant)
Leaf Area Index (LAI) - Correct answer-measure of leaf area per unit area
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, secondary production - Correct answer-consumption of organic matter by
heterotrophs
big fierce animals are rare - Correct answer-they require more energy
net secondary production - Correct answer-Ingestion - Respiration - Egestion
resilience - Correct answer-ability to recover quickly from disturbance
resistance - Correct answer-ability to absorb disturbances with little change
primary succession - Correct answer-changes that occur to a habitat following a
disturbance that kill virtually all organisms
secondary succession - Correct answer-pattern of recolonization following a
disturbance in which only some of the organisms are killed
linear succession - Correct answer-theory that succession progresses through
various stages that include a climax stage ending with a stable end point
traits of early succession competitor - Correct answer--high reproductive rates
-disperse long distances
-germinate and grow quickly in poor soils
-successful when competitors are absent
-serotiny
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
