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NECO SSCE Biology 2023 past questions and answers

This 2023 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 2023 set with instant marking.

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Sample NECO SSCE Biology 2023 questions

1. In a grassland food chain, which organism occupies the first trophic level?
  1. A grasshopper
  2. A grass plant
  3. A lizard
  4. A hawk

Answer: B. A grass plant

Green plants are producers and form the first trophic level.

2. A population has reached its carrying capacity when
  1. all individuals have stopped reproducing
  2. the population has no predators
  3. food supply is unlimited
  4. the environment can support it sustainably at its current size

Answer: D. the environment can support it sustainably at its current size

Carrying capacity is the maximum population size the available resources can sustain over time.

3. Which group of organisms releases mineral nutrients from dead organic matter into the soil?
  1. Decomposers
  2. Primary consumers
  3. Producers
  4. Pollinators

Answer: A. Decomposers

Decomposers break down dead material and return mineral nutrients to the environment.

4. Which method is most suitable for estimating the abundance of small plants in a field?
  1. Mark-and-recapture
  2. Transect counting of flying insects
  3. Random quadrat sampling
  4. Counting organisms in a pond water sample

Answer: C. Random quadrat sampling

Random quadrats provide sample counts that can be used to estimate plant abundance in an area.

5. A bee obtains nectar from a flower while transferring pollen between flowers; this relationship is an example of
  1. parasitism
  2. mutualism
  3. competition
  4. predation

Answer: B. mutualism

The bee gains food and the flower benefits from pollination, so both organisms benefit.

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