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JAMB Biology 2003 Question 19

Question 19

Cell and Its Environment

Organisms I, II, III and IV have surface/volume ratios of 1:2, 1:3, 1:4 and 1:5 respectively. The organism that is likely to have the most complex transport system is

  1. A.IV
  2. B.III
  3. C.I
  4. D.II.
Show the answer and explanation

Answer: A (IV)

Explanation

The smaller the surface area compared with volume, the less an organism can rely on diffusion alone. IV has the smallest ratio (1:5), so it needs the most complex transport system.