Biology 0610 · IGCSE · Pollution

Pollution — practice question

What graph illustrates the effect of pollution from untreated sewage on the amount of oxygen dissolved in a river?

    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