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WAEC WASSCE Biology 2010 past questions and answers

This 2010 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 2010 set with instant marking.

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Sample WAEC WASSCE Biology 2010 questions

1. Which group forms the entry point for most energy in a terrestrial food chain?
  1. Green plants
  2. Carnivores
  3. Decomposers
  4. Herbivores

Answer: A. Green plants

Green plants capture sunlight and convert it to chemical energy by photosynthesis.

2. A survey records 240 snails in a field measuring 3 hectares; what is the population density?
  1. 8 snails per hectare
  2. 80 snails per hectare
  3. 120 snails per hectare
  4. 720 snails per hectare

Answer: B. 80 snails per hectare

Population density is 240 divided by 3, which equals 80 snails per hectare.

3. A farmer releases a ladybird species that feeds on crop aphids; this is an example of
  1. crop rotation
  2. artificial selection
  3. biological control
  4. soil leaching

Answer: C. biological control

Biological control uses a living organism to reduce a pest population.

4. Fertiliser washed from farmland into a pond is most likely to cause which sequence of events?
  1. Lower nutrient levels followed by increased oxygen
  2. Reduced algal growth followed by clearer water
  3. Rapid loss of all dissolved minerals
  4. Algal bloom followed by oxygen depletion as organisms decay

Answer: D. Algal bloom followed by oxygen depletion as organisms decay

Excess nutrients promote algal growth, and decomposition of the resulting biomass uses dissolved oxygen.

5. In the chain grass → grasshopper → lizard → hawk, which organism is at the first trophic level?
  1. Grass
  2. Grasshopper
  3. Lizard
  4. Hawk

Answer: A. Grass

The producer, grass, occupies the first trophic level.

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