B-1 B cells are an important part of the innate immune response. Unlike other B cells, they can produce antibodies early in infection because they do not require which of the following?

Second messengers, such as calcium ions (Ca2+), are chemical mediators commonly used in intracellular signaling pathways

For an autoreactive receptor, an encounter with the self-antigen results in strong cross-linking of IgM receptor. Which if the following applies for continued gene rearrangement?

B cell development in the bone marrow is an inherently wasteful process. Nearly half of the pro-B cells produced will die without progressing to the next stage of development. This massive loss of pro-B cells is due to

In comparing Brazilian independence with that in Spanish America, which of the following is true? 

Consider Donald Stevens’s essay about the film Camila.  How does Stevens characterize the real historical person Adolfo O’Gorman, and how does this view differ from the film’s fictionalized portrayal?  

Who enslaved Native people in colonial Latin America? 

In which regions of colonial Latin America did the encomienda system thrive? 

In the Cuban film Maluala, Maluala is the name of

In colonial Latin America, the term encomienda referred to