The carbon skeletons of amino acids can be used as which of the following?
A) an energy source
B) a starting material for the synthesis of more complicated molecules
C) both a and b
D) neither a nor b
C
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The Basin and Range Province located in the ____ is characterized by ____ faults
a. central United States; reverse b. western United States; reverse c. central United States; normal d. eastern United States; normal e. western United States; normal
Which two gases are primarily responsible for the greenhouse effect because of their ability to absorb infrared energy?
A) oxygen and hydrogen B) ozone and dust C) nitrogen and oxygen D) water vapor and carbon dioxide
Earth materials through which water flows rapidly _____
a. have a high porosity b. have a low porosity c. have a high permeability d. have a low permeability e. have a high viscosity
Entisols are the least developed soils in the world
Indicate whether the statement is true or false