“The house wren is a small, sexually monomorphic and monochromatic migratory songbird that breeds throughout much of North America.”

“There were also large differences between populations in diversity, some of the populations being monomorphic and some polymorphic.”

“The black guillemot is a sexually monomorphic seabird that exhibits marked interpair variation in a number of breeding parameters.”

“These lesions were characterized by a monomorphous pattern of slender, elongated spindle cells in a sclerotic stroma.”

“The cells were monomorphous with oval nuclei, but also showed elongated and spindled features.”

“Cytologie preparations contained a predominantly monomorphous population of tumor cells with moderate eosinophilic cytoplasm with fine, elongated cytoplasmic processes.”