The body's continuing immune response and defense against pathogens it has seen before is known as a. immunoglobulins b. graft-versus-host c. active immunity d. passive immunity

C. Active immunity

Active immunity is the body’s continuing immune response and defense against previous pathogens. This means that it requires exposure to a pathogen or antigen as like in an immunization where an artificial active immunity is building up a resistance to a disease by clonal selection and expansion builds up sufficient antibody.

Furthermore, first exposure to pathogen will lead to what is called a primary response while secondary response is if a person is exposed to the pathogen again, the response is much faster and stronger. Active immunity can endure for years or the entire life of a person.

the animal that would be cutest if scaled down to the size of a cat? elephant

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.