Ecology
- Adaptations and interdependence
- Levels of organisation
- Organism
- Population
- Community
- Ecosystem
- Competition
- Plants: light, space, water, ions
- Animals: food, mates, territory
- Interdependence
- Stable community
- Abiotic factors
- Light
- Temperature
- Moisture
- Soil pH and minerals
- Biotic factors
- Food
- New predators
- New pathogens
- Outcompeted
- Adaptations
- Structural
- Behavioural
- Functional
- Extremophiles
- Levels of organisation
- Organisation of an ecosystem
- Food chains
- Producer
- Primary consumer
- Predator and prey
- Sampling
- Quadrats
- Transects
- Mean, mode, median
- Predator-prey cycles
- Prey peaks first
- Carbon cycle
- Photosynthesis
- Respiration
- Decay
- Water cycle
- Evaporation
- Precipitation
- Microorganisms
- Return carbon dioxide
- Return mineral ions
- Food chains
- Biodiversity and humans
- Biodiversity
- Variety of species
- Stability
- Waste and pollution
- Water
- Air
- Land
- Land use
- Building
- Quarrying
- Farming
- Peat bogs
- Deforestation
- Cattle and rice
- Biofuels
- Global warming
- Carbon dioxide
- Methane
- Habitat loss
- Maintaining biodiversity
- Breeding programmes
- Protect habitats
- Hedgerows
- Recycling
- Biodiversity