Topics: Immunity and Vaccines Quiz
Which line of defense includes the skin, sweat, mucous membranes, and normal microbiota?
A. First
B. Second
C. Third
Select your answer:

Topics:
Health Issues and Concerns Your Body Urinary Cosmetology Microbes Protein Synthesis Enzymes Diseases Key Terms AEMT EMS Systems Characteristics of Life Circulatory and Nervous System Hospice Basics Mouth - Stomach Terms for The Skeletal System 3M Micropara Living OrganismsOther quiz:
Biology for Engineers › ViewCrossing or breeding experiment that deals with two alternate forms a single character is called
A. Monohybrid cross
B. Dihybrid cross
C. Test crosss
D. none
Circulatory System › View
How long does a red blood cell live on average?
A. 50 days
B. 100 days
C. 120 days
D. 200 days