Which of the Following Statements Is Consistent with the Process

question 4

Multiple Choice

Which of the following statements is consistent with the process of clonal selection?

• A)The specificity of a lymphocyte antigen receptor changes to accommodate the structure of an antigen that binds to it.
• B)Many different antigen receptors with different specificities are expressed on each lymphocyte.
• C)Lymphocytes do not express antigen receptors on their cell surfaces until after exposure to antigen.
• D)The diversity of the lymphocyte repertoire for antigens is very small before exposure to antigen but increases significantly after antigen exposure.
• E)The diversity of the lymphocyte repertoire for antigens is very large before exposure to antigen,with millions of different clones of lymphocytes,each having a different specificity.

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Definitions:

Order Effects

The impact that the sequence of presenting stimuli or conditions can have on participant responses in an experimental design.

Systematic Bias

Describes a consistent, non-random distortion in data collection, analysis, or interpretation processes that can lead to inaccurate conclusions.

Internal Validity

Refers to the extent to which a study can demonstrate a cause-and-effect relationship between variables, excluding the influence of external factors.

Posttest-Only Control

A research design in which outcomes are measured only after the experiment or intervention, without a pretest comparison.