Cambridge Secondary (7-9). Stage 8. Science. Learner's Book - Unit 4: Ecosystems - Question 40

How many times greater is the concentration of DDT in a cormorant’s body than in a minnow’s body?

DDT concentrations: water 0.00005 ppm; protoctists 0.04 ppm; shrimps 0.16 ppm; minnows 0.50 ppm; cormorants 26.40 ppm.