
What was the biggest source of contamination of fresh drinking water in early civilizations?
A. Animals living close to people
B. Lack of a water source (desert conditions)
C. Wells that are not dug deep enough
D. Aqueducts were not built high enough
Select your answer:

Topics:
Nutrition Vocabulary The Skeletal System Microbial Growth & Nutrition Erythrocyte Disorders Introduction to Kinesiology Tissues Vocabulary Cell Diversity - Organization, Tissues, Plants and Animals Common Respiratoty Diseases Healthy Lifestyle Linked Gene Pathology Introduction Cell Injury Functional Neuroanatomy of the CNS Nutrition In Animal Immune Cells Faction Anatomy of the EyeOther quiz:
Blood Pressure › ViewDevice used to take blood pressure:
A. defibrillator
B. stethoscope
C. sphygmomameter
D. thermometer
3M Micropara › View
These exoenzymes that allow the pathogens to escape from clots
A. coagulase
B. fibrinolysins
C. hemolysins
D. hyaluronidase