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WAEC WASSCE Biology 2005 past questions and answers

This 2005 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 2005 set with instant marking.

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Sample WAEC WASSCE Biology 2005 questions

1. In a grassland food chain, why is less energy available to a hawk than to the grass at the start?
  1. Energy is created by consumers
  2. All energy in grass is stored permanently
  3. Organisms use much energy in life processes and lose heat
  4. Hawks absorb energy directly from soil

Answer: C. Organisms use much energy in life processes and lose heat

At each trophic level, much energy is used in metabolism and dissipated as heat, so only a fraction passes on.

2. Which process removes carbon dioxide from the atmosphere and incorporates its carbon into organic food?
  1. Photosynthesis
  2. Combustion
  3. Respiration
  4. Decomposition

Answer: A. Photosynthesis

Green plants use atmospheric carbon dioxide to make organic compounds during photosynthesis.

3. A student estimates the abundance of a small plant species in a field using several quadrats; which procedure improves the reliability of the estimate?
  1. Place every quadrat beside the same tree
  2. Choose many quadrat positions at random
  3. Count only plants along the field edge
  4. Use a different quadrat size for every count

Answer: B. Choose many quadrat positions at random

Random placement of many quadrats reduces selection bias and better represents the whole field.

4. In the chain maize → grasshopper → frog → snake, which organism is the secondary consumer?
  1. Maize
  2. Grasshopper
  3. Snake
  4. Frog

Answer: D. Frog

The frog feeds on the primary consumer, the grasshopper, and is therefore the secondary consumer.

5. Which action is most likely to maintain a forest resource for future generations?
  1. Clear-fell the entire forest each season
  2. Burn the forest to remove all undergrowth
  3. Harvest selected trees and replant cleared areas
  4. Drain nearby wetlands for timber storage

Answer: C. Harvest selected trees and replant cleared areas

Selective harvesting combined with replanting allows forest cover and timber stocks to recover.

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