An investigation is carried out to find how different environmental conditions affect the rate of decomposition of organic material. Which row in the table shows the conditions that would result in the slowest rate of decomposition?
| Oxygen | Temperature (∘C^\circ\text{C}∘C) | Moisture | |
|---|---|---|---|
| A | Present | 35 | Present |
| B | Absent | 5 | Absent |
| C | Present | 5 | Present |
| D | Absent | 35 | Present |
Row A
Row B
Row C
Row D
67 exam-style questions on OCR GCSE Biology 4.1 Ecosystems, covering 4.1.1 Cycling of materials in ecosystems, 4.1.2 Microorganisms in cycling materials, 4.1.3 The carbon and water cycles, 4.1.4 Factors affecting decomposition, 4.1.5 Levels of organisation in an ecosystem, 4.1.6 Abiotic and biotic factors affecting communities, 4.1.7 Interdependence and competition, 4.1.8 Trophic levels, 4.1.9 Pyramids of biomass, and 4.1.10 Efficiency of biomass transfers. Each one has a worked solution and a mark scheme showing where the marks go.