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JAMB UTME Biology 2010 past questions and answers

This 2010 JAMB UTME 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 JAMB UTME Biology 2010 questions

1. If producers in a grassland store 10,000 kJ of energy and about 10% is transferred to primary consumers, how much energy is available to those consumers?
  1. 100 kJ
  2. 1,000 kJ
  3. 5,000 kJ
  4. 9,000 kJ

Answer: B. 1,000 kJ

Ten per cent of 10,000 kJ is 1,000 kJ.

2. A plant species is found in 18 of 30 quadrats placed at random in a field; what is its frequency in the sampled field?
  1. 18%
  2. 30%
  3. 48%
  4. 60%

Answer: D. 60%

Frequency is (18/30) x 100, which equals 60%.

3. In a mark-release-recapture study, 40 insects are marked and released; later, 50 insects are caught and 10 are marked, so what is the estimated population?
  1. 200
  2. 100
  3. 125
  4. 250

Answer: A. 200

The estimate is (40 x 50)/10 = 200 insects.

4. Which process is carried out by nitrogen-fixing bacteria in the root nodules of leguminous plants?
  1. Conversion of nitrates to nitrogen gas
  2. Conversion of ammonia to nitrites
  3. Conversion of atmospheric nitrogen to usable nitrogen compounds
  4. Release of nitrogen gas from decaying proteins

Answer: C. Conversion of atmospheric nitrogen to usable nitrogen compounds

Nitrogen-fixing bacteria convert atmospheric nitrogen into compounds that can enter biological nitrogen cycles.

5. A population of rabbits in a fenced reserve grows rapidly but later levels off as food becomes scarce; what best explains the levelling off?
  1. The rabbits have stopped reproducing permanently
  2. The population has approached the environment's carrying capacity
  3. The birth rate has become greater than the death rate
  4. The reserve has gained unlimited resources

Answer: B. The population has approached the environment's carrying capacity

Limited resources prevent continued growth once the population approaches carrying capacity.

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