O-LevelBiologyEcology & Environment5090/12 · May/June 2016 · Q281 Mark
A farmer is growing wheat in a field. The farmer uses insecticides to kill insect pests and chemicals to kill weeds in the field. Which statements about this field are correct? 1 Both the wheat and the weeds are producers. 2 Insects feed at the first trophic level. 3 Weeds may use light, water and mineral ions that the wheat plants need.
A1 and 2 only
B1 and 3 only
C2 and 3 only
D1, 2 and 3
✓ Correct answer
B: 1 and 3 only
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