| A | B |
|---|
| symbosis | the interdependence of two organisms of different species. |
| population | organisms that live in the same habitat that can interbreed with only themselves |
| community | Different pouplations of organisms that live together |
| bioshpere | The entire planet and all its living thing. It is self-sustainable |
| Ecosystem | a relatively self-contained, dynamic system composed of a natural community along with its physical environment |
| Parasitism | intimate ecological relationship between two organisms in which one, the parasite, lives at the expense of the other, the host, on which it is dependent for its nutritional and other requirements |
| producer | The one that make its own food |
| predator | One who kills other organisms for food |
| species | individuals of which can interbreed but are unable to breed with other such groups. |
| Food Web | set of interconnected food chains by which energy and materials circulate within an ecosystem |
| Food Chain | the food relationships between organisms |
| biotic environment | Living things that influence the life of the organisms |
| abiotic environment | Physical factors that influence the life of the organisms |
| mutualism | A relationship where both organism benefits |
| herbivore | Animals that feed on plants |
| Decomposers | Organisms that decompose dead bodies |
| Scavengers | Organisms that aid decomposition |
| ecological niche | Way that the organism fit itself into its habitat and making use of the food avaliable |
| consumers | Ones that feed on others and could not mak its own food |
| Food pyramids | Graphical representation of the biomass or numbers of the organisms |
| Carbon cycle | the cycle of carbon usage by which energy flows through the Earth's ecosystem. |
| Nitrogen Cycle | natural cyclic process in the course of which atmospheric nitrogen enters the soil and becomes part of living organisms, before returning to the atmosphere |
| denitrification | The process that remove the nitrates or nitrites from |
| hydroshpere | the layer of water surrounding earth |
| Atmosphere | the layer of air surrounding earth |
| lithosphere | the rigid outer part of the earth consisting of the crust and upper mantle |
| Autotroph | Organisms that can manufacture their own food |
| Heterotrophic | Organisms that cannot manufacture their own food |
| Kingdom | the highest classificatory group |
| genera | Species that do not interbreed with each other but are clearly related by important shared traits |
| orders | one or more genera that are grouped into a family |
| fundamental niche | the environments in which the members of a species can live. |
| realized niche | niche that is actually occupied |
| Biodiversity | variety or diversity within the biological world |
| habitat | the natural home of an organism. |
| Envronment | the physical surroundings, conditions, circumstances, etc., in which an organism lives in |
| Nitrogen Fixation | biological or industrial process by which molecular atmospheric nitrogen is converted into a chemical compound that is essential for plant growth and is also used in industrial chemical production. |
| Haber process | the production of ammonia by passing a mixture of atmospheric nitrogen and hydrogen over a metallic catalyst at 500°-600°C (932°-1112°F). |
| Pollution | contamination of the environment by man-made substances or energy that have adverse effects on living or non-living matter. |
| Over-exploitation | Using the resource until it runs out or so badly damaged that it can not be used again |
