Q106 · Practice questionSimple familiar1 mark
QUESTION 106
A grazer consumes food containing 1200 kJ. During the same interval it egests 500 kJ and releases 450 kJ through respiration. These are the only losses in the complete energy budget. How much energy is stored in new grazer biomass?
(A)
250 kJ
(B)
450 kJ
(C)
700 kJ
(D)
1200 kJ
WORKED SOLUTION
1 markAnswer A
Answer
A
Working
New biomass receives the remainder: 1200 − 500 − 450 = 250 kJ. Egested material was not assimilated; respired energy is unavailable as new grazer biomass.
Marking criteria
- Select A. [1 mark]
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
View the QCAA syllabus