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WAEC WASSCE Biology 2019 past questions and answers

This 2019 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 2019 set with instant marking.

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Sample WAEC WASSCE Biology 2019 questions

1. Which process enables water to enter a root hair cell from moist soil?
  1. Osmosis
  2. Transpiration
  3. Diffusion of solutes
  4. Active transport

Answer: A. Osmosis

Water moves into the root hair across its selectively permeable membrane by osmosis.

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

Answer: B. Xylem

Xylem vessels conduct water and mineral ions upward through the plant.

3. Under which conditions would a leafy plant usually lose water vapour most rapidly?
  1. Cool, humid and still air
  2. Cool, dry and still air
  3. Warm, dry and windy air
  4. Warm, humid and still air

Answer: C. Warm, dry and windy air

Warmth, low humidity and moving air together promote rapid evaporation and diffusion of water vapour.

4. Which blood vessel carries oxygenated blood from the lungs to the heart?
  1. Pulmonary artery
  2. Aorta
  3. Vena cava
  4. Pulmonary vein

Answer: D. Pulmonary vein

The pulmonary veins return oxygenated blood from the lungs to the left atrium.

5. Which equation best represents aerobic respiration in a human cell?
  1. Glucose + oxygen -> carbon dioxide + water + energy
  2. Glucose -> lactic acid + oxygen
  3. Carbon dioxide + water -> glucose + energy
  4. Glucose + nitrogen -> alcohol + water

Answer: A. Glucose + oxygen -> carbon dioxide + water + energy

Aerobic respiration uses oxygen to break down glucose, releasing energy and producing carbon dioxide and water.

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