Q10 · Practice questionSimple familiar1 mark
QUESTION 10
In a pond, producers store 18000 kJ in new biomass during a month. Primary consumers store 1800 kJ and secondary consumers store 144 kJ. The transfer efficiency from primary to secondary consumers is
(A)
0.8%
(B)
8.0%
(C)
10%
(D)
12.5%
WORKED SOLUTION
1 markAnswer B
Answer
B
Working
Use the two relevant trophic levels: . Dividing by producer biomass energy would instead give the efficiency across two transfers.
Marking criteria
- Select B. [1 mark]
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
View the QCAA syllabus