Examlex
Which of the following did NOT play a role in Middle/South America's population explosion in the twentieth century?
Protein
Large, complex molecules made up of amino acids that play many critical roles in the body, including providing structure to cells and facilitating biological reactions.
Irreversible Change
A permanent alteration of a substance or system from which recovery or return to the original condition is impossible under normal conditions.
Enzymes
Biological molecules that significantly speed up the rate of virtually all of the chemical reactions that take place within cells.
Organic Compounds
Chemical compounds that contain carbon-hydrogen bonds, including a wide range of substances such as fuels, plastics, food additives, and drugs.
Q11: The peninsula shared by Portugal and Spain
Q117: The United Nations Human Development Index indicates
Q126: Much of the lowland in Louisiana and
Q139: Which is true of Europe's largest mountain
Q192: What does power purchasing parity (PPP) account
Q201: By the 1600s, most former European colonies
Q213: About one in eight jobs in Europe
Q245: Literacy rates in medieval Europe received a
Q248: Lines of longitude (also called meridians) run
Q299: Which of the following is NOT an