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JAMB Biology 1998 Question 16

Question 16

Cell and Its Environment

Unicellular organisms transport essential nutrients directly to all parts of their bodies by the process of diffusion because, they have

  1. A.a large volume to surface area ratio
  2. B.a large surface area to volume ratio
  3. C.their bodies immersed in the nutrients
  4. D.their outer membrane made of cellulose.
Show the answer and explanation

Answer: B (a large surface area to volume ratio)

Explanation

Small organisms have a large surface area compared with their volume, so diffusion alone can supply every part.