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WAEC Biology 2012 Question 4

Question 4

Cell Structure and Organisation

The disadvantage of complexity of organisation in the higher organisms is that it leads to

  1. A.mutual interdependence between component cells.
  2. B.internal structural specialization.
  3. C.increased adaptation to environment.
  4. D.slower rate of diffusion of oxygen to individual cells.
Show the answer and explanation

Answer: D (slower rate of diffusion of oxygen to individual cells.)

Explanation

In a large, complex body most cells are far from the surface, so oxygen cannot reach them fast enough by diffusion alone; transport systems are needed.