Which is true of predictions about the expected population of the United States in the year 2050?
A) Emigration is expected to have a large effect on the U.S. population.
B) The population is expected to grow about 43 percent.
C) Immigration is not expected to have a large effect on the U.S. population.
D) The U.S. population will exceed 1.5 billion.
Answer: B
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A. 10% B. 20% C. 30% D. 50% E. 60%
The purpose of employing CPR to a person
who has sudden cardiac arrest is to
a. restart their heart. b. ensure an oxygen supply to their brain. c. keep their lungs inflated. d. restart their heart and ensure an oxygen supply to their brain. e. restart their heart and keep their lungs inflated
The term that describes cumulative genetic changes that give rise to new species is ____
a. microevolution b. macroevolution c. gene pooling d. genetic drift e. group divergence
The toxin of Vibrio cholerae causes profuse diarrhea because it _____
A) modifies a G protein involved in regulating salt and water secretion B) binds with adenylyl cyclase and triggers the formation of cAMP C) signals IP3 to act as a second messenger for the release of calcium D) modifies calmodulin and activates a cascade of protein kinases