O-LevelBiologyEcology & Environment5090/11 · May/June 2010 · Q281 Mark
What would be an undesirable feature in an insecticide?
AIt becomes more concentrated at each stage in the food web.
BIt breaks down within a few months.
CIt destroys one particular insect only.
DIt destroys the immature forms of the insect.
✓ Correct answer
A: It becomes more concentrated at each stage in the food web.
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