Which of the Following Statements Are Fundamental to the Clonal-

question 30

Multiple Choice

Which of the following statements are fundamental to the clonal- selection theory of how the adaptive immune system functions?
I. Each mature lymphocyte has a unique membrane receptor that recognizes one antigen.
II. When the lymphocyte binds an antigen, the lymphocyte is activated and begins dividing to form many ident copies of itself.
III. Cloned lymphocytes have slight differences and are selected by the spleen for removal if they do not bind an antigen.
IV. Cloned cells descend from an activated lymphocyte and persist even after the pathogen is eliminated.

• A) only I, II, and IV
• B) only II and IV
• C) only I and III
• D) only II, III, and IV
• E) I, II, III, and IV

---

Definitions:

Income Inequality

The unequal distribution of income within a population, often measured by various statistical means, indicating the gap between the rich and the poor.

Developed Countries

Nations with high levels of industrialization, a higher standard of living, advanced technological infrastructure, and more complex economic systems compared to developing countries.

Poverty Line

An absolute level of income set by the federal government for each family size below which a family is deemed to be in poverty.

Absolute Standard

A measure or criterion that is not influenced by external factors and remains constant over time.