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Thomas- Life Science

Sem 1 Life Science

QuestionAnswer
an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide. Autotroph
an organism deriving its nutritional requirements from complex organic substances. Heterotroph
a hierarchical series of organisms each dependent on the next as a source of food Food Chain
a system of interlocking and interdependent food chains Food Web
an animal that feeds on plants Herbivore
the total mass of organisms in a given area or volume Biomass
the tidal mouth of a large river, where the tide meets the stream Estuary
interaction between two different organisms living in close physical association Symbiosis
symbiosis that is beneficial to both organisms involved Mutualism
an association between two organisms in which one benefits and the other derives neither benefit nor harm Commensalism
a thick subsurface layer of soil that remains frozen throughout the year Permafrost
an animal that feeds on carrion, dead plant material, or refuse Scavenger
the branch of biology that deals with the relations of organisms to one another and to their physical surroundings Ecology
an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material Decomposer
an animal or person that eats food of both plant and animal origin Omnivore
Created by: 20rthomas
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