When a chemical messenger has a short half-life, it means that

Active immunity requires

The thymus is at its maximum size

The cortex of a lymph node contains multiple lymphatic nodules.

1. For the following variable, “year of birth”, this would be an example of which level of measurement? [1] 2. The mean is resistant to extreme data values (outliers). [2] 3. For the variable, “Telephone Number”, this is an example of what type of variable?[3] 4. Suppose that a student needs to obtain survey information regarding how many hours other students in his school spend playing video games for a school project.   He decides to interview who shows up to the next meeting of his school’s video game club.  This is an example of what type of bias?[4] 5. The following probability rule, 

The walls of lymphatic capillaries are only one cell thick.

 3.  Explain the use of valves on the modern tenor and bass trombone.  Include the possible tuning set-ups for tenor or your preferred tuning and why.  Also, explain a common set-up for double valve bass.  

Lymphatic capillaries

UMBILIC

This roof style most likely belongs to which society?