Select the correct statement about the immune system. Select the correct statement about the immune system. All antigen receptors produced by a single B cell or T cell are identical and bind to the same epitope. Adaptive immunity is characteristic of invertebrates and vertebrates. Antibodies are secreted by T cells.

All antigen receptors produced by a single B or T cell are identical and bind to the same epitope.

Explanation:

Epitope or antigen determinant is the specific part of the antigen that is recognized by an antibody or T-cell receptor. During clonal selection, a lymphocyte proliferates and differentiates to form a group of highly specialized cells in response to a specific antigen present in the body.

The result of clonal selection is the formation of a population of identical cells that recognize the same specific epitope of the same antigen. A lymphocyte that undergoes clonal selection gives rise to two major types of cells in the clone: effector cells and memory cells.

For instance, the clonal propagation of B lymphocytes forms plasma cells (the effector cell) and memory cells. The plasma cells synthesize and secrete specific proteins called antibodies. All the antibodies derived from a plasma cell can bind to and inactivate the same specific antigen.