4-mark practice questions — Edexcel GCSE Biology (1BI0)
146 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
- Explain how selective breeding could be used to develop a new variety of wheat that produces a higher yield of grain.
- During exercise, the breathing rate of a student increases. Explain how this helps to maintain efficient gas exchange in…
- Explain why the daughter cells produced by mitosis must be genetically identical to the parent cell, and describe the ro…
- Describe how meiosis and fertilisation together ensure that offspring produced by sexual reproduction are genetically di…
- Explain how the body's defence mechanisms prevent pathogens from entering the bloodstream when a person breathes in air …
- Explain the role of decomposers and nitrifying bacteria in making nitrogen available for plant uptake.
- Describe how mutations can lead to genetic variation within a population of organisms.
- Explain how a nerve impulse is transmitted from a motor neurone to an effector.