OCR GCSE Combined Science A · J250
Specification B4.1b, B5 · Biology Paper 1, Biology Paper 2, Chemistry Paper 1, Chemistry Paper 2, Physics Paper 1, Physics Paper 2
Revise: Microorganisms in Material CyclingMicroorganisms, especially bacteria and fungi, play a major role in this recycling. Many act as decomposers: organisms that break down dead organisms and biological waste.
- Revise: Microbiological Techniques
An organism too small to be seen individually with the naked eye, such as a bacterium or yeast.