Why is clonal selection and expansion so important to the immune response?

A) It facilitates the secretion of cytokines.
B) It enables certain cells to kill target cells.
C) It is critical to the increase in the numbers of specific cells.
D) It facilitates interleukin secretion which in turn directs cell differentiation.

In iceland, the mid atlantic ridge runs through the center of the contry. what can you conclude about the apperence of iceland many thousands of years from now?

Which statement best describes a typical difference that could be found between the "analysis" and "conclusion" sections of a lab report? a) only the "conclusion" describes errors that occurred during the experiment, and only the "analysis" section suggests further research.b) only the "analysis" section includes specific data comparisons, and only the "conclusion" section suggests further research.c) only the "analysis" section discusses whether the original hypothesis was supported, and both sections include graphs of data.d) only the "conclusion section discusses whether the original hypothesis was supported, and both sections suggest further research.(the answer is b i just took the test)

Which of the following is required of a new drug?me