Biomass - the total quantity or weight of organisms in a given area or volume, Niche - a role or 'job' taken on by a certain organism within an ecosystem, Hydroponics - the process of growing plants in sand, gravel, or liquid with added nutrients but NO SOIL., Symbiosis - interaction between two different organisms living in close physical association, typically to the advantage of both, Autotroph - n organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide, Parasitism - living as a parasite on or with another animal or organism, Mutualism - symbiosis which is beneficial to both organisms involved., Omnivores - an animal or person that eats a variety of food of both plant and animal origin., Eutrophication - excessive richness of nutrients in a lake or other body of water, frequently due to run-off from the land (usually from artificial fertilisers) , which causes a dense growth of plant life., Intensive Farming - a way of farming a large number of animals in a relatively small area of land,

Organisms, Ecosystems & their Environment

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