<P> Carbon fixation or сarbon assimilation is the conversion process of inorganic carbon ( carbon dioxide ) to organic compounds by living organisms . The most prominent example is photosynthesis , although chemosynthesis is another form of carbon fixation that can take place in the absence of sunlight . Organisms that grow by fixing carbon are called autotrophs . Autotrophs include photoautotrophs , which synthesize organic compounds using the energy of sunlight , and lithoautotrophs , which synthesize organic compounds using the energy of inorganic oxidation . Heterotrophs are organisms that grow using the carbon fixed by autotrophs . The organic compounds are used by heterotrophs to produce energy and to build body structures . `` Fixed carbon '' , `` reduced carbon '' , and `` organic carbon '' are equivalent terms for various organic compounds . </P>
<P> Carbon fixation or сarbon assimilation is the conversion process of inorganic carbon ( carbon dioxide ) to organic compounds by living organisms . The most prominent example is photosynthesis , although chemosynthesis is another form of carbon fixation that can take place in the absence of sunlight . Organisms that grow by fixing carbon are called autotrophs . Autotrophs include photoautotrophs , which synthesize organic compounds using the energy of sunlight , and lithoautotrophs , which synthesize organic compounds using the energy of inorganic oxidation . Heterotrophs are organisms that grow using the carbon fixed by autotrophs . The organic compounds are used by heterotrophs to produce energy and to build body structures . `` Fixed carbon '' , `` reduced carbon '' , and `` organic carbon '' are equivalent terms for various organic compounds . </P>
which group of organisms in the carbon cycle fixes co2 from the atmosphere
which group of organisms in the carbon cycle fixes co2 from the atmosphere
Autotrophs
Autotrophs