What is the main role of B cells in the immune response?

Gamma X-rays Ultraviolet Visible Infrared Microwaves Radio waves Which has a shorter wavelength energy, orange light or yellow light?

Gamma X-rays Ultraviolet Visible Infrared Microwaves Radio waves Which has a higher energy, green light or ultraviolet?  

  How many unpaired electrons does a ground-state atom of Arsenic, Ge (element 32), have?

A system initially has an internal energy U of 519 J. It undergoes a process during which it releases 119 J of heat energy to the surroundings, and does work of 411 J. What is the final energy of the system, in J? Type your answer here.  No work needs to be submitted.  

___________________created worldwide turmoil resulting in the death of 20 to 40 million people.

Columbia signed a treaty giving the U.S. the right to construct and operate a canal.

Why did President Wilson create the Committee on Public Information (CPI)?

President Wilson engaged in U.S. foreign interventions.

The___________________ was the clearest statement of American war aims and vision for a new international order.