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NECO SSCE Biology 2024 past questions and answers

This 2024 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 2024 set with instant marking.

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Sample NECO SSCE Biology 2024 questions

1. If producers in a food chain store 1,000 J of energy, approximately how much energy is expected to pass to the primary consumers under the 10% transfer rule?
  1. 10 J
  2. 100 J
  3. 500 J
  4. 900 J

Answer: B. 100 J

Ten per cent of 1,000 J is 100 J.

2. In a habitat, the largest population that can be maintained indefinitely with available resources is called the
  1. biomass
  2. birth rate
  3. ecological niche
  4. carrying capacity

Answer: D. carrying capacity

Carrying capacity is the maximum population size that an environment can support sustainably.

3. Which free-living soil bacterium can convert atmospheric nitrogen into nitrogen compounds usable by plants?
  1. Azotobacter
  2. Nitrobacter
  3. Lactobacillus
  4. Pseudomonas

Answer: A. Azotobacter

Azotobacter fixes atmospheric nitrogen in the soil without living in root nodules.

4. A persistent pesticide becomes increasingly concentrated in organisms at successive trophic levels, reaching its highest concentration in a fish-eating bird; this process is
  1. eutrophication
  2. decomposition
  3. biomagnification
  4. nitrogen fixation

Answer: C. biomagnification

Biomagnification is the increase in concentration of a persistent substance along a food chain.

5. Which conservation method protects a species within the ecosystem where it naturally occurs?
  1. Seed storage in a gene bank
  2. Establishing a wildlife reserve in its native range
  3. Keeping specimens in a museum
  4. Breeding the species in a zoo outside its range

Answer: B. Establishing a wildlife reserve in its native range

A wildlife reserve in the species' native range is an in-situ conservation method.

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