Acontour line that forms a closed loop and has small dashes pointing to the inside of the loop represents a/an

choose one answer. a. 4
b. unknown area
c. depression in the ground
d. small plateau

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen