People do not often die of Aids.

B cells need stimulation from helper cells but T cells so not need that type of stimulation.

Species immunity is an example of:

After having 4 daughters, a couple is again pregnant. Their chances of having another  daughter are:

Following instructions given at the beginning of this test, define nucleotide

DiGeorge syndrome may be the result of:

Following instructions given at the beginning of this test, define meiosis

Chemicals that are found in the cell membrane and product prostaglandins and leukotrienes:

Following instructions given at the beginning of this test, define epitope

Answer Five of the following essay questions. You may answer a 6th for a bonus. Name and describe 3 of the mechanisms of type II hypersensitivity.