Biology 0610 · IGCSE · Energy flow

Energy flow — practice question

What is the main energy source for biological systems?

  • Akinetic
  • Bphotosynthesis
  • Crespiration
  • Dthe Sun

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