A microbe that can be successfully cultured in the dark in a broth that includes only sugar and a few amino acids has a chemoheterotroph metabolism.
The expression 'chemoheterotroph metabolism' makes reference to microorganisms that can survive by breaking down certain chemical compounds.
In this case, the microbe has chemoheterotroph metabolism because it can obtain its energy by breaking down sugar (simple carbohydrates) and amino acids.
In conclusion, a microbe that can be successfully cultured in the dark in a broth that includes only sugar and a few amino acids has a chemoheterotroph metabolism.
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