[Solved] Why is skin color not biologically adequate to distinguish a group of people? A)Skin color is a continuum of difference. B)Skin color is not visible to all people. C)Color is a cultural category and not all people define color the same way. D)Skin color is never the sole characteristics of race. E)Skin does not technically hold or transmit color. Blood Tinged Urine: Urine that contains blood, visible to the naked eye or under a microscope, indicating possible underlying medical conditions. Urinalysis: A laboratory test analyzing the content of urine for medical diagnostic purposes. Cyanosis: A bluish or purplish discoloration of the skin and mucous membranes due to insufficient oxygen in the blood. Buccal Mucosa: The inner lining of the cheeks, consisting of a mucus-secreting membrane, often examined in medical and dental evaluations.