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B and T cells that are no longer needed undergo ____________________ to ensure that a specific immune response is self-limiting.
Graduate Record Exam
A standardized test that is an admissions requirement for many graduate schools in the United States and Canada.
Confederate Forces
Military units or groups that were loyal to the Confederate States of America during the American Civil War.
Pennsylvania
A state located in the northeastern region of the United States, known for its rich history, diverse landscapes, and significant cultural contributions.
William C. Durant
An American industrialist and the founder of General Motors, a key figure in the establishment of the automobile industry in the United States.
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