Immunodeficiencies are a result of all of the following EXCEPT
A) HIV infection.
B) cyclosporine.
C) DiGeorge syndrome.
D) Hodgkin's disease.
E) autoimmune diseases.
E
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Africanized honeybees, also called killer bees, are a concern in the Southwest. They differ from European honeybees ________
a. all of the choices b. in that their venom is 5 to 10 times more potent c. in that they respond more aggressively to their alarm pheromone d. by stinging their target multiple times rather than just once
Which of the following factors can result in a nation developing a comparative advantage?
a. an abundance of highly skilled labor. b. large amounts of unskilled labor. c. a favorable climate. d. All of these.
Parental care of the young is usually associated with species with a type ________ survivorship curve.
A. I B. II C. III D. I or II (depending on the sex ratio) E. I or III (depending on whether the reproductive strategy is iteroparous or semelparous)
pH 4 is ______________x more acidic than pH 7.
Fill in the blank(s) with the appropriate word(s).