Q11 · Practice questionComplex familiar1 mark
QUESTION 11
Which organism occupies both the second and third trophic levels in the food web?
(A)
Algae
(B)
Grazing snails
(C)
Insect larvae
(D)
None of the organisms shown
WORKED SOLUTION
1 markAnswer D
Answer
D
Working
Both grazing snails and insect larvae consume algae, so each is at the second trophic level. Small fish consume those primary consumers and occupy the third level; large fish occupy the fourth. No organism shown feeds at both the second and third levels.
Marking criteria
- Select D. [1 mark]
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
View the QCAA syllabus