Biology 5090 · O Level · Human gas exchange

Human gas exchange — practice question

Which of the following is not a characteristic of alveoli?

  • Aa large surface area
  • Ba moist surface
  • Ccilia
  • Dwalls one cell thick

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