Question

passive immunity involves the transfer what substance?
a antibodies
b pathogen
c memory cells
d b cells

Explanation:

Passive immunity is the transfer of ready - made antibodies, which provide immediate protection against pathogens without the body having to produce its own antibodies first. Pathogens are disease - causing agents, memory cells are part of the adaptive immune response for long - term immunity, and B cells are a type of white blood cell involved in antibody production. But in passive immunity, it's the antibodies that are transferred.

Answer:

A. Antibodies