How would a subculture appear if a colony containing both S

Solution

The slant would show colonies of S marcescens and M luteus as red and yellow respectively.

S marcescens is a gram negative rod shaped organism who has an unique feature of producing a red colour pigment called prodigiosin at room temperature. Whereas M luteus is a gram positive coccus shaped organism who produces yellow coloured carotenoid pigments anf grows slowly at room temperature.