Biology 5090 · O Level · Effects of humans on ecosystems

Effects of humans on ecosystems — practice question

Which of the following, after being disposed of, affects a river ecosystem for the briefest period of time?

  • Afertilisers
  • Bhot water
  • Cinsecticides
  • Dsewage

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