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WAEC WASSCE Biology 2008 past questions and answers

This 2008 WAEC WASSCE Biology set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2008 set with instant marking.

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Sample WAEC WASSCE Biology 2008 questions

1. Which route does blood take from the right ventricle to reach the lungs?
  1. Right ventricle -> pulmonary artery -> lungs
  2. Right ventricle -> aorta -> lungs
  3. Right ventricle -> pulmonary vein -> lungs
  4. Right ventricle -> vena cava -> lungs

Answer: A. Right ventricle -> pulmonary artery -> lungs

The right ventricle pumps deoxygenated blood through the pulmonary artery to the lungs.

2. Which process is chiefly responsible for the upward movement of water through the xylem of a tall tree?
  1. Active transport by root hairs alone
  2. Transpiration pull through a continuous column of water
  3. Diffusion of sugars from leaves into the roots
  4. Pressure exerted by phloem sap

Answer: B. Transpiration pull through a continuous column of water

Water loss from leaves creates a transpiration pull that draws a continuous water column upward in xylem.

3. Which set of products is formed when glucose is completely oxidised during aerobic respiration?
  1. Lactic acid and energy
  2. Ethanol, carbon dioxide and energy
  3. Carbon dioxide, water and energy
  4. Glucose and oxygen

Answer: C. Carbon dioxide, water and energy

Complete aerobic oxidation of glucose produces carbon dioxide, water and usable energy.

4. Where does ultrafiltration of blood occur in a mammalian kidney?
  1. Collecting duct
  2. Loop of Henle
  3. Distal convoluted tubule
  4. Glomerulus into Bowman's capsule

Answer: D. Glomerulus into Bowman's capsule

High pressure in the glomerulus forces water and small solutes into Bowman's capsule.

5. What change directly causes a stoma to open in a well-watered leaf?
  1. Guard cells become turgid and bow apart
  2. Guard cells lose water and become flaccid
  3. The subsidiary cells divide
  4. The epidermal cells lose their cuticle

Answer: A. Guard cells become turgid and bow apart

Water entering the guard cells makes them turgid, causing the stomatal pore to open.

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