In addition to proteins, which type of molecules sometimes function as enzymes?
A) carbohydrates
B) DNA
C) lipids
D) RNA
D
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The transitional stage in Frank Notestein's demographic model is initiated by ________
A) resource depletion B) industrialization C) government intervention D) epidemics E) the increased use of contraceptives
An estuary is ________
A) a coral reef ecosystem that has experienced bleaching because of changes in water temperature B) a person who compiles and analyzes statistics to determine the maximum allowable catch for fish and other seafood C) a landform created from the silt that moves down a river and into the ocean D) a biologically rich area where a river flows into the ocean, where fresh- and saltwater mix
A hurricane rotates about its eye, which is a(n)
A. rainstorm. B. calm area of low pressure. C. turbulent area of high pressure. D. area of high moisture.
What was the Second Agricultural Revolution?
A) development of hunting and gathering societies B) formation of a global agricultural system C) domestication of plants and animals D) industrialization of Agriculture E) establishment of the World Trade Organization