An ecological investigation of a peat bog ecosystem was conducted to determine the factors influencing the distribution of the insectivorous round-leaved sundew (Drosera rotundifolia).
Which row in the table below correctly classifies these ecological parameters and identifies the biological level of organization represented by all the living organisms of all species inhabiting this peat bog?
| Abiotic factor | Biotic factor | Level of organization | |
|---|---|---|---|
| A | Peat water pH | Density of Sphagnum moss | Community |
| B | Concentration of humic acid | Soil ammonium concentration | Population |
| C | Interspecific competition | Abundance of insect prey | Community |
| D | Water table depth | Rate of cellular respiration | Ecosystem |
Row A
Row B
Row C
Row D
111 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.