PassSpark

JAMB UTME Biology 2025 past questions and answers

This 2025 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 2025 set with instant marking.

Practise the full 2025 setTimed exam mode

Sample JAMB UTME Biology 2025 questions

1. In an aquatic plant experiment, the rate of photosynthesis has reached a plateau even though light intensity is increased. If carbon dioxide is scarce, which change is most likely to raise the rate further?
  1. Increase the carbon dioxide concentration
  2. Reduce the water temperature far below the plant's optimum
  3. Shade the plants more heavily
  4. Remove all mineral salts from the water

Answer: A. Increase the carbon dioxide concentration

Once light is no longer limiting, increasing the scarce carbon dioxide can raise photosynthesis until another factor becomes limiting.

2. A survey records 48 lizards in a grassland area of 0.8 hectares. What is the estimated population density?
  1. 38.4 lizards per hectare
  2. 60 lizards per hectare
  3. 48 lizards per hectare
  4. 0.017 lizards per hectare

Answer: B. 60 lizards per hectare

Population density is 48 divided by 0.8, which equals 60 lizards per hectare.

3. A plant community stores 20,000 kJ of energy, and about 10% is transferred to the herbivores that feed on it. How much energy is transferred to the herbivores?
  1. 200 kJ
  2. 20,000 kJ
  3. 2,000 kJ
  4. 18,000 kJ

Answer: C. 2,000 kJ

Ten percent of 20,000 kJ is 0.10 x 20,000 = 2,000 kJ.

4. Fungi and bacteria decompose dead leaves on a forest floor. Their most direct ecological role is to
  1. convert sunlight into chemical energy
  2. remove carbon permanently from the ecosystem
  3. consume producers and transfer energy to herbivores
  4. release mineral nutrients from organic matter for reuse

Answer: D. release mineral nutrients from organic matter for reuse

Decomposers break down organic matter and return mineral nutrients to the environment.

5. Bare rock exposed after a landslide gradually becomes vegetated. Which organisms are most likely to colonise it first?
  1. Lichens
  2. Large trees
  3. Predatory birds
  4. Burrowing mammals

Answer: A. Lichens

Lichens can grow on bare rock and help form the initial soil in primary succession.

More JAMB UTME Biology years

20262024202320222021202020192018201720162015201420132012201120102009200820072006200520042003200220012000

All JAMB UTME Biology years · JAMB UTME subjects

PassSpark questions are original practice questions written to each exam's syllabus and format, in the style of past questions. They are not official past papers and are not affiliated with JAMB, WAEC, NECO, any university or any exam body.