Which of these is an example of passive immunity?
• a person develops antibodies to fight off an ear infection
• antibodies are passed from a pregnant woman to an infant through breast milk
• a person develops antibodies against the measles vaccine
• A person is vaccinated for hepatitis B

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

How does the carbon cycle involve an exchange of carbon