Idiom
To talk through one's hat

To speak fluently
To speak at random
To talk nonsense
To talk wisdom

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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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