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The immunoglobulin class that is the only one capable of crossing the placenta is ________.

Each of the following are physical barriers to pathogens except ________.

Microbes can be identified using automated biochemical tests, often without incubation.  An example of this type of test would include ________.

Destruction of lymphocytes with self specificity is called ________.

 The T-cell receptor is the CD4 molecule.

Each of the following are benefits of fever except it ________.

A female who is Rh– ________.

Which of these techniques is a work around to an invasive biopsy? 

Gamma-delta T cells differ from other T cells in that ________.

All of the following are characteristics of IgM except ________.