Serratia marcescens cells produce a red pigment at room temperature. the red color of the colonies is an example of which of the following?
genotype
phenotype
change in dna base composition
adaptation to the environment

The red color of the colonies is an example of a phenotype .

Explanation:

Serratia marcescens -

They are the species ,that are , gram - negative bacteria , rod - shaped ,

they are from the family of Enterobacteriaceae .

Serratia marcescens are mostly found in the urinary and respiratory tracts of the hospitalized adults and in children , in  the gastrointestinal systems .

S. Mercescens are most commonly found in the environment , growing the bathroom and dirt .

It is gram-negative, produces a reddish - orange tripyrrole pigment called the prodigiosin , is an example of phenotype .