Hemophilia is a genetic disorder in which the blood
a. does not contain platelets.
b. does not contain white blood cells.
c. contains too many platelets.
d. does not contain the usual clotting factors.
e. contains too many clotting factors.
D
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A mammal is _____ and has a body temperature _____.
A) ectothermic; that changes with fluctuation in environmental temperature B) endothermic; that changes with fluctuation in environmental temperature C) ectothermic; maintained by its own metabolism D) endothermic; maintained by its own metabolism E) None of the answer choices is correct.
Bacteria can increase the Earth's temperature by
A) generating a great deal of heat in metabolism. B) producing CH4, which is a greenhouse gas. C) using the greenhouse gas CO2. D) providing nutrients for plant growth. E) oxidizing CH4.
Post-exposure prophylaxis for rabies includes shots of HRIG (human rabies immune globulin) and rabies vaccine. The HRIG provides ________________ whereas the vaccine promotes the development of _______________.
A) Artificial passive immunity; natural active immunity B) Artificial active immunity; artificial passive immunity C) Artificial active immunity; natural active immunity D) Artificial passive immunity; artificial active immunity
Which of the following is a reason for metabolic regulation?
A. Maintain cell components at appropriate levels B. Ensure efficient use of energy stores C. Conserve materials D. All of the choices are correct.