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WAEC WASSCE Biology 2007 past questions and answers

This 2007 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 2007 set with instant marking.

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Sample WAEC WASSCE Biology 2007 questions

1. Which plant tissue carries water and dissolved mineral salts from the roots towards the leaves?
  1. Xylem
  2. Phloem
  3. Cambium
  4. Epidermis

Answer: A. Xylem

Xylem vessels conduct water and mineral salts from roots to the rest of the plant.

2. What is the immediate effect on transpiration when most stomata on a leaf close?
  1. The rate increases because less water enters the leaf
  2. The rate decreases because less water vapour escapes
  3. The rate remains constant because lenticels take over completely
  4. The rate increases because carbon dioxide cannot enter

Answer: B. The rate decreases because less water vapour escapes

Closing stomata reduces the main route by which water vapour leaves a leaf.

3. At which site can a person commonly feel the pulse by gently pressing an artery near the skin?
  1. The vena cava at the chest
  2. The pulmonary vein at the lung
  3. The radial artery at the wrist
  4. The capillaries inside the liver

Answer: C. The radial artery at the wrist

The radial artery at the wrist is superficial enough for the pressure wave of each heartbeat to be felt.

4. Which substances are the principal end products of aerobic respiration of glucose in a mammal?
  1. Lactic acid and oxygen
  2. Ethanol and carbon dioxide
  3. Glucose and water
  4. Carbon dioxide and water

Answer: D. Carbon dioxide and water

Complete aerobic oxidation of glucose produces carbon dioxide and water while releasing energy.

5. In which part of a nephron does blood ultrafiltration begin?
  1. The glomerulus into Bowman's capsule
  2. The loop of Henle into the collecting duct
  3. The distal convoluted tubule into the ureter
  4. The collecting duct into the renal artery

Answer: A. The glomerulus into Bowman's capsule

High pressure in glomerular capillaries forces small solutes and water into Bowman's capsule.

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