★ Biology Quiz
Hydrogen, chlorine, and sodium are examples of ___.
A. compounds
B. elements
C. molecules
D. isotopes
Select your answer:
Topics:
Protozoan Diseases Circulatory, Artery, Vein - basics Schizophrenia Vitamins Nutrition and Biochemistry Vocabulary Excretory and Musculoskeletal System Macromolecules and Enzymes Terms for The Skeletal System Body Movements Bacteria Types of Medical Reports A Treat For Mosquitoes Immunity & Cancer Trichology Cell & BondOther quiz:
Human Body › ViewWhy is exposure to good amount of sunlght important to the skin?
A. skin becomes stretchable
B. skin becomes moisturized
C. skin produces vitamin D
D. skin tans
Teeth & Microbes › View
A special doctor who looks after teeth is called what?
A. dentist
B. cardiologist
C. hygienist