Which of following describes a solution in which the a and b anomers of glucose have reached equilibrium?
A) There are equal amounts of the two anomers.
B) The solution shows no optical activity.
C) both a and b
D) neither a nor b
D
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The following statements pertain to the collection of data for the purpose of making population projections. Which statement is correct?
A. Although not identical, approximately 75% of the world collects accurate census population data. B. The region of the world with the least reliable population data due to its inability to collect data is Africa. C. Data collection is universal and identical throughout the world. D. The homeless problem in the world is insignificant and plays no role in population projections.
Which of the following is true of the Salk vaccine against the polio virus?
A) It contains a virus which has been inactivated by treatment with formaldehyde. B) It contains a mutated form of the virus which is temperature sensitive. C) It contains a very small amount of the natural virus. D) None of the above is correct.
North America has experienced a demographic transition that resulted in what kind of changes in the population of North America?
A) Lower birthrates, lower death rates, and longer life expectancies B) Higher birthrates, lower death rates, and longer life expectancies C) Lower birthrates, higher death rates, and shorter life expectancies D) Higher birthrates, higher death rates, and shorter life expectancies
Which of the following is TRUE regarding the effects of the Coriolis force?
A) The Coriolis force is zero along the equator, increasing to one-half of maximum at 30° latitude and maximum at the poles. B) The amount of Coriolis deflection is uniform from equator to poles. C) Coriolis deflection occurs only along parallels, not meridians. D) The Coriolis force is zero at the poles, increasing to maximum along the equator.