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NECO SSCE Biology 2014 past questions and answers

This 2014 NECO SSCE 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 2014 set with instant marking.

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Sample NECO SSCE Biology 2014 questions

1. Which process returns nitrogen in dead organisms to the soil as ammonium compounds?
  1. Nitrification
  2. Ammonification
  3. Denitrification
  4. Nitrogen fixation

Answer: B. Ammonification

Decomposers release ammonium compounds from organic nitrogen during ammonification.

2. A quadrat measuring 1 m by 1 m contains an average of 7 seedlings; what is the estimated density in a 20 m by 10 m plot?
  1. 140 seedlings
  2. 700 seedlings
  3. 14,000 seedlings
  4. 1,400 seedlings

Answer: D. 1,400 seedlings

The plot covers 200 m^2, so an average of 7 seedlings per m^2 gives 7 × 200 = 1,400 seedlings.

3. If producers store 20,000 kJ of energy and consumers receive approximately 10% at each trophic transfer, how much energy reaches secondary consumers?
  1. 20 kJ
  2. 200 kJ
  3. 2,000 kJ
  4. 18,000 kJ

Answer: B. 200 kJ

Two transfers retain 10% each, so secondary consumers receive 20,000 × 0.1 × 0.1 = 200 kJ.

4. On bare rock, which organisms are commonly among the first colonisers in primary succession?
  1. Grasses
  2. Large trees
  3. Earthworms
  4. Lichens

Answer: D. Lichens

Lichens can grow on bare rock and help form soil through weathering and organic matter accumulation.

5. Excessive fertiliser runoff into a lake may cause eutrophication, which is most directly followed by a decrease in dissolved oxygen because of
  1. increased photosynthesis by submerged plants
  2. reduced water temperature
  3. increased salinity of the lake
  4. respiration by decomposers breaking down dead algae

Answer: D. respiration by decomposers breaking down dead algae

Decomposers use dissolved oxygen while breaking down the large amount of dead algal biomass.

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