Idiom
A black sheep

An unlucky person
None of these
A partner who takes no share of the profits
A lucky person
An ugly person

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Idiom
Select the correct statement about active and passive immunity.

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

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