A bacterium which cannot synthesize all organic molecules needed for its growth is known as a/an:

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An auxotroph is a bacterium that cannot synthesize all organic molecules needed for its growth and therefore requires supplementation of certain nutrients. Prototrophs, on the other hand, have the ability to synthesize all necessary organic molecules from basic nutrients. Autotrophs can produce organic molecules using inorganic materials while organotrophs derive energy by oxidizing organic molecules. Heterotrophs obtain energy by the consumption of organic substances.

A Bacterium Which Cannot Synthesize All Organic Molecules Needed for Its