Explanation:
Converting more consumed food into body growth means that the animal has greater secondary productivity efficiency.
6. Which change would generally increase the efficiency of energy transfer to the next trophic level?
A.
A greater fraction of food being converted into biomass
B.
A greater fraction of food being lost as heat
C.
A greater fraction of food remaining uneaten
D.
A complete absence of food intake
Correct Answer:
A greater fraction of food being converted into biomass
Explanation:
Energy transfer efficiency increases when a larger fraction of consumed food becomes biomass available to the next trophic level.
7. If gross primary productivity is 100 units and respiration uses 40 units, the net productivity is 60 units. The efficiency of retaining captured energy as net production is:
A.
40%
B.
60%
C.
100%
D.
140%
Correct Answer:
60%
Explanation:
Net productivity is 60 units out of 100 units of gross productivity, so retention efficiency is 60/100 × 100 = 60%.
8. Which statement correctly compares gross and net productivity efficiency in plants?
A.
Net productivity is lower because some captured energy is used in respiration
B.
Net productivity is always greater than gross productivity
C.
Gross productivity excludes all captured energy
D.
Respiration increases the energy available for growth
Correct Answer:
Net productivity is lower because some captured energy is used in respiration
Explanation:
Plants use part of gross production for respiration, so the energy retained as net productivity is lower.
9. A food chain transfers 10% of the biomass energy from one trophic level to the next. This percentage represents:
A.
Trophic transfer efficiency
B.
Respiratory loss
C.
Gross primary productivity
D.
Total solar energy received
Correct Answer:
Trophic transfer efficiency
Explanation:
The percentage of biomass energy passed from one trophic level to the next is called trophic transfer efficiency.
10. Which organism is directly responsible for primary productivity efficiency in an ecosystem?
A.
Green plant
B.
Herbivore
C.
Carnivore
D.
Detritivore
Correct Answer:
Green plant
Explanation:
Green plants carry out photosynthesis and determine how efficiently solar energy is converted into chemical energy during primary production.
Short Questions and Answers
Practice short questions and answers related to
Productivity Efficiency
.
Short questions are currently unavailable for this page.