Categorization of bacteria-production of organic material
How are bacteria categorized according to the production of organic material for energetic metabolism?
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Most of the bacteria are heterotroph; they do not make their own food. There are as well autotroph bacteria: photosynthetic or chemosynthetic. Some photosynthetic bacteria, such as cyanobacteria, make photosynthesis similar to plants do, employing water. Others, the sulphur photosynthetic bacteria, employ hydrogen sulphide (H2S) rather than water.
Extracellular digestion: It is that digestion in which food breaking into utile molecules which can be internalized by the cell is prepared in the extracellular space, that is, exterior the cell. In extracellular digestion the cells secret substances
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