The Term Clonal in Clonal Selection Refers to the Fact

question 47

Multiple Choice

The term clonal in clonal selection refers to the fact that

• A) a lymphocyte can be easily converted into a stem cell line for laboratory research.
• B) a single activated B cell produces many identical copies of the antibody,which react to the antigen that activated the B cell.
• C) an activated B cell can convert itself quickly into helper and cytotoxic T cells that are specific for the same antigen.
• D) once activated,a specific lymphocyte divides mitotically,producing identical copies of itself.

---

Definitions:

High-low Method

A technique used in cost accounting to estimate variable and fixed costs based on the highest and lowest levels of activity.

Machine Hours

A measure of the amount of time a machine is operated, used in accounting to allocate manufacturing overhead costs.

Cost Driver

A factor that causes a change in the cost of an activity, essentially determining the level of expense incurred in producing a product or service.

Least Squares Regression

A statistical method used to determine the line of best fit by minimizing the sum of the squares of the differences between observed and predicted values.