4-mark practice questions — WJEC GCSE Biology (Wales)
145 questions · biology · View as Markdown
How to answer
4-mark questions are the shortest levels-of-response band. Aim for four scientific ideas, each in its own short sentence.
Sample questions
- Describe how water moves from the soil into a plant and up to the leaves.
- Explain why a person who has recovered from chickenpox is unlikely to become ill from the same disease again.
- Explain why the energy requirements of two people of the same age and body mass may be different.
- Explain why a habitat with a large number of different species is considered to have high biodiversity.
- Describe the path taken by an oxygen molecule from the nose to the alveoli.
- Describe how a mutation in a gene could affect the phenotype of an organism.
- Describe what happens to a protein-rich food, such as a piece of chicken, as it passes through the human digestive syste…
- Explain why decomposers are essential for returning nutrients to the soil, and describe what would happen to plant growt…