Development of emerging infectious disease can be a result of all of the following EXCEPT
A) microbial mutation.
B) modern transportation.
C) use of genetically modified foods.
D) changes in the environment.
E) overuse of antibiotics.
C
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Which of the following enables almost all cells of the body to be recognized by an individual's immune system as "self"?
A. The presence of class I MHC molecules on cell surfaces B. The presence of class II MHC molecules on cell surfaces C. The presence of ABO antigenic markers on cell surfaces D. The presence of Ig D molecules on cell surfaces
The antidiuretic hormone (ADH) ____
a. controls levels of GH b. influences levels of LH c. influences levels of FSH d. reduces urine output e. causes contractions of the uterus
Which of the following types of evidence supports the multiregional model for human evolution?
1.genetic markers on the Y chromosome 2.fossil evidence 3.mitochondrial DNA 4.microsatellite data 5.autosomal gene sequences
An artificial pacemaker supplements the actions of
a. sympathetic neurons. b. the atrioventricular node. c. the medulla oblongata. d. the sinoatrial node. e. the heart muscle itself