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NECO SSCE Biology 2012 past questions and answers

This 2012 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 2012 set with instant marking.

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Sample NECO SSCE Biology 2012 questions

1. A population of antelope increases rapidly when grass is abundant, but its growth slows as food and space become scarce. The maximum population size that the habitat can support over time is its
  1. biotic potential
  2. ecological niche
  3. trophic level
  4. carrying capacity

Answer: D. carrying capacity

Carrying capacity is the largest population an environment can sustain with its available resources.

2. Why is the biomass usually smaller at each successive trophic level in a food chain?
  1. Only a small fraction of energy at one trophic level becomes biomass available to the next
  2. Producers obtain all their energy from consumers
  3. Energy is created as organisms feed
  4. Every organism is eaten completely by the next level

Answer: A. Only a small fraction of energy at one trophic level becomes biomass available to the next

Much energy is used in life processes or lost as heat and waste, so only a fraction passes on as biomass.

3. A persistent pesticide enters a pond and becomes increasingly concentrated in organisms higher in the food chain. This process is called
  1. eutrophication
  2. biological magnification
  3. nitrogen fixation
  4. biodegradation

Answer: B. biological magnification

Biological magnification is the increase in concentration of a persistent pollutant at higher trophic levels.

4. After a grassland fire, grasses and herbs recolonize soil that remains intact, followed gradually by shrubs and trees. This is an example of
  1. primary succession
  2. desertification
  3. secondary succession
  4. eutrophication

Answer: C. secondary succession

Secondary succession occurs when a community regrows on previously occupied land where soil remains.

5. Which activity is an example of in-situ conservation of an endangered antelope?
  1. Keeping its skin in a museum
  2. Storing its reproductive cells in a laboratory
  3. Breeding it only in a zoo
  4. Protecting it within a national park in its natural habitat

Answer: D. Protecting it within a national park in its natural habitat

In-situ conservation protects a species within its natural habitat.

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