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WAEC WASSCE Biology 2017 past questions and answers

This 2017 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 2017 set with instant marking.

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Sample WAEC WASSCE Biology 2017 questions

1. The ability of an organism to detect and respond to changes in its surroundings is called
  1. irritability
  2. reproduction
  3. respiration
  4. growth

Answer: A. irritability

Irritability is the ability to sense and respond to stimuli.

2. In the scientific name Homo sapiens, the first word identifies the organism's
  1. species
  2. genus
  3. family
  4. order

Answer: B. genus

In binomial nomenclature, the first word is the genus name.

3. Which structure gives a plant cell much of its rigidity and is mainly made of cellulose?
  1. cell membrane
  2. vacuole
  3. cell wall
  4. cytoplasm

Answer: C. cell wall

The cellulose cell wall provides support and helps maintain plant cell shape.

4. During osmosis, water moves across a selectively permeable membrane from a region of
  1. lower water potential to higher water potential
  2. higher solute concentration to lower solute concentration without a membrane
  3. equal water potential to lower water potential only when energy is supplied
  4. higher water potential to lower water potential

Answer: D. higher water potential to lower water potential

Osmosis is the net movement of water down its water-potential gradient through a selectively permeable membrane.

5. Which outcome is normally produced when one diploid body cell completes mitosis and cytokinesis?
  1. Four genetically different haploid cells
  2. Two genetically similar daughter cells with the same chromosome number as the parent
  3. Two genetically different cells with half the parent chromosome number
  4. Four genetically identical diploid cells

Answer: B. Two genetically similar daughter cells with the same chromosome number as the parent

Mitosis produces two daughter cells that normally retain the parent's chromosome number and genetic information.

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