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WAEC WASSCE Biology 2000 past questions and answers

This 2000 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 2000 set with instant marking.

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Sample WAEC WASSCE Biology 2000 questions

1. Which observation most directly demonstrates sensitivity in a living organism?
  1. A shoot bends toward a window admitting light
  2. A dry seed becomes heavier after absorbing water
  3. A crystal becomes larger as more material is deposited
  4. A stone rolls downhill when pushed

Answer: A. A shoot bends toward a window admitting light

The shoot's directional response to light is a response to a stimulus, which demonstrates sensitivity.

2. In the scientific name Mangifera indica, what does the first word show?
  1. The species epithet
  2. The genus to which the organism belongs
  3. The family name
  4. The common name of the organism

Answer: B. The genus to which the organism belongs

In binomial nomenclature, the first word is the genus and the second is the specific epithet.

3. Which cell organelle is the main site of aerobic respiration?
  1. Ribosome
  2. Golgi body
  3. Mitochondrion
  4. Vacuole

Answer: C. Mitochondrion

Mitochondria are the principal sites where aerobic respiration releases usable energy in eukaryotic cells.

4. A microscope forms an image 18 mm long from a specimen that is 0.045 mm long; what is the magnification?
  1. 40 times
  2. 200 times
  3. 360 times
  4. 400 times

Answer: D. 400 times

Magnification is image length divided by actual length, so 18 mm / 0.045 mm = 400 times.

5. What is the main significance of the selectively permeable cell membrane?
  1. It controls which substances enter and leave the cell
  2. It manufactures all proteins in the cell
  3. It stores the cell's hereditary information
  4. It carries out photosynthesis in every cell

Answer: A. It controls which substances enter and leave the cell

Selective permeability allows the cell membrane to regulate the movement of substances into and out of the cell.

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