Idiom
White blood cell act

For clotting blood
As a source of energy
As a defence against infection
As a medium for oxygen transport from lung to tissues

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Idiom
Select the correct statement about active and passive immunity.

Active and passive humoral immunity are both mechanisms of adaptive immunity that useantibodies
The antibodies utilized in active immunity are acquired from another organism
A vaccination is an example of the introduction of passive immunity into the body
Immunological memory is established by passive immunization

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