PassSpark

WAEC WASSCE Biology 2011 past questions and answers

This 2011 WAEC WASSCE 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 2011 set with instant marking.

Practise the full 2011 setTimed exam mode

Sample WAEC WASSCE Biology 2011 questions

1. If producers in a grassland store 12,000 kJ of energy and 10% is passed to primary consumers, how much energy reaches the primary consumers?
  1. 1,200 kJ
  2. 120 kJ
  3. 10,800 kJ
  4. 12,000 kJ

Answer: A. 1,200 kJ

Ten percent of 12,000 kJ is 1,200 kJ.

2. Which group of organisms releases mineral nutrients from dead plants and animals back into the soil?
  1. Green plants
  2. Decomposers
  3. Primary consumers
  4. Pollinators

Answer: B. Decomposers

Decomposers break down dead organic matter and release mineral nutrients.

3. A student counts 80 seedlings in four quadrats, each measuring 0.5 m by 0.5 m, placed in a uniform 100 m2 plot; what is the estimated number of seedlings in the plot?
  1. 800
  2. 2,000
  3. 8,000
  4. 32,000

Answer: C. 8,000

The four quadrats sample 1 m2 altogether, so 80 seedlings per m2 gives an estimate of 8,000 in 100 m2.

4. Which organism commonly fixes atmospheric nitrogen in the root nodules of leguminous plants?
  1. Nitrosomonas
  2. Penicillium
  3. Lactobacillus
  4. Rhizobium

Answer: D. Rhizobium

Rhizobium bacteria in legume root nodules convert atmospheric nitrogen into usable nitrogen compounds.

5. A farmer releases a native ladybird beetle that feeds on crop aphids; this is an example of
  1. mechanical control
  2. biological control
  3. chemical control
  4. crop rotation

Answer: B. biological control

Biological control uses a living organism to reduce the population of a pest.

More WAEC WASSCE Biology years

20262025202420232022202120202019201820172016201520142013201220102009200820072006200520042003200220012000

All WAEC WASSCE Biology years · WAEC WASSCE 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.