In addition to proteins, which type of molecules sometimes function as enzymes?

A) carbohydrates
B) DNA
C) lipids
D) RNA


D

Environmental & Atmospheric Sciences

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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

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences

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.

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences