| A | B |
|---|
| ecology | The study of the interaction of living organisims with their environment |
| biotic environment | made up of living things that influence the life of the organisms |
| biomes | a major ecological community type |
| pH value | determines the acidity and alkalinity |
| Mutualism | Both parties beneficial but do not depend on each other for survival |
| Symbiosis | Both party beneficial but depend on each other for survial |
| Commensalism | A relationship between two organisms where one benefits while the other is neutral |
| Parasitism | A relationship between two organisms whereby one benefits while the other is harmed |
| Predator-prey relationship | The relationship between a predator and its prey |
| Population | Made up of one kind of organism living in a habitat |
| Community | Different populations of plants and animals living together in the same habitat |
| Food producers | Organisms that make their own food: green plants |
| Food chain | Shows the relationship among organisms |
| Food web | A network of interconnected food chains |
| Food pyramids | Shows the number of different links in a food chain |
| Niche | a habitat supplying the factors necessary for the existence of an organism or species |
| Turgid | When a cell is filled up, it becomes hard and swollen |
| Pyramid of biomass | A pyramid that shows the mass of living matter at each level of the food chain |
| Carbon cycle | Circulation of carbon in the environment |
| Nitrogen cycle | Circulation of nitrogen in the environment |
| Global warming | Warming up of the Earth's climate |
| Deforestation | Excessive cutting down of the Earth's forest |
| Over-exploitation | Using the resource until it runs out or is so badly damaged that it can no longer be used |
| Haber process | Man-made process |
| Plasmolysis | Break-up due to water molecule moving out of cell |
