Question

what best distinguishes b cells from t cells? b cells destroy pathogens while t cells produce antigens; b cells produce antibodies, while t cells attack and kill infected cells; b cells are white blood cells, while t cells are red blood cells; b cells are produced in the blood, while t cells are produced in the thyroid

Explanation:

To determine the correct option, we analyze each choice:

• Option 1: T cells don't produce antigens; B cells and T cells respond to antigens. Eliminate.
• Option 2: B cells (B lymphocytes) produce antibodies (humoral immunity), T cells (T lymphocytes) attack infected cells (cell - mediated immunity). This matches their functions.
• Option 3: Both B and T cells are white blood cells. T cells aren't red blood cells. Eliminate.
• Option 4: Both B and T cells are produced in the bone marrow (T cells mature in the thymus, not produced there). T cells aren't produced in the thyroid. Eliminate.

Answer:

B. B cells produce antibodies, while T cells attack and kill infected cells