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JAMB UTME Biology 2024 past questions and answers

This 2024 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 2024 set with instant marking.

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Sample JAMB UTME Biology 2024 questions

1. In a grassland food chain, which process accounts for most of the energy lost between one trophic level and the next?
  1. Energy stored in the bodies of predators
  2. Conversion of sunlight into chemical energy
  3. Respiration and heat loss by organisms
  4. Absorption of minerals by producers

Answer: C. Respiration and heat loss by organisms

Organisms use much of the energy they assimilate in respiration, releasing it as heat that is unavailable to the next trophic level.

2. A population of insects increases rapidly at first but later remains nearly constant as food and nesting sites become limiting. The population has reached its
  1. carrying capacity
  2. biotic potential
  3. immigration rate
  4. ecological succession

Answer: A. carrying capacity

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

3. A tapeworm living in the intestine of a dog obtains food while harming its host. This relationship is
  1. mutualism
  2. commensalism
  3. competition
  4. parasitism

Answer: D. parasitism

In parasitism, the parasite benefits while the host is harmed.

4. Fertiliser washed into a lake causes rapid growth of algae, followed by a decline in dissolved oxygen. The oxygen decline is mainly due to
  1. increased photosynthesis by submerged plants
  2. decomposition of dead algae by microorganisms
  3. reduced evaporation from the lake
  4. absorption of oxygen by mineral salts

Answer: B. decomposition of dead algae by microorganisms

Decomposer microorganisms use dissolved oxygen as they break down the large mass of dead algae.

5. A thick, waxy cuticle on the leaf of a desert plant chiefly helps it to
  1. reduce water loss
  2. increase mineral uptake
  3. trap insects for food
  4. promote pollination

Answer: A. reduce water loss

The waxy cuticle limits evaporation from the leaf surface in dry conditions.

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