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JAMB Biology 2003 Question 6

Question 6

Excretion

Use the diagram to answer: The processes of water loss and intake indicated by the arrows labelled I and II are respectively.

Diagram for this question
  1. A.exhalation and osmosis
  2. B.urination and diffusion
  3. C.osmosis and diffusion
  4. D.evaporation and osmosis.
Show the answer and explanation

Answer: D (evaporation and osmosis.)

Explanation

Arrow I shows water leaving the moist skin into the air, which is evaporation. Arrow II shows water entering through the skin from the pond by osmosis, because the frog's body fluids are more concentrated than fresh water.