Structured Practice

Food-chain contamination

Descriptive Answer

Descriptive Answer 20 marks 35 minutes 500 words

Explain bioaccumulation and biomagnification and analyse why top predators face greater risk from persistent pollutants.

Practice workspace

Write notes or your response

35:00

Suggested approach

Define relevant concepts; show calculations where required; connect scientific mechanisms with policy implications; state assumptions.

Self-assessment rubric

Concept accuracy 35%; reasoning/calculation 30%; application 25%; clarity 10%.