Biology 0610 · IGCSE · Pollution

Pollution — practice question

The graph illustrates the concentrations of dissolved oxygen and mineral ions in a river. At which point does raw sewage flow into the river?

  • AA
  • BB
  • CC
  • DD

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI