★ Cosmetology Quiz
What substance in the cortex gives natural color to the hair?
A. Protein
B. Melanin
C. Sebum
D. Tissue
Select your answer:
Topics:
Composition of Blood and Blood Cells Vocabulary for Organisms in Ecosystems Communicable Diseases and Immune Response (OCR) Sexual Reproduction Excretory System DNA and Genetic Manipulation Body Fluids & Circulation Nutrition Pathology Endocrine Non-Communicable Disease Types of Nutrients Sensory System Key Terms Muscle System Cardiovascular Adaptation Refresher Immune Cells FactionOther quiz:
Urinary System Medical Terms › ViewWhen doctors find bacteria in your urine they’ll diagnose you with:
A. bacteriuria
B. pyuria
C. glycosuria
D. polyuria
Cell › View
Who discovered the nucleus of the cell?
A. Robert Hooke
B. Robert Brown
C. Leeuwenhoek
D. Purkinje