Most fresh water exists as:
a. ice
b. soil water
c. aquifer water
d. surface water (lakes, rivers)
e. atmosphere
a
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The absence of ________ in the primitive atmosphere was essential to the origin of life on Earth
A) N2 B) CO2 C) CH4 D) O2
In your biology lab, you are given a vial that contains fish urine. Your assignment is to predict whether the urine came from a fresh- or saltwater species. You discover that the urine contains a high concentration of salts. What is your prediction for the fish's habitat? What is the concentration of solutes in the fish relative to its environment?
A. Marine; hypoosmotic B. Freshwater; hypoosmotic C. Freshwater; hyperosmotic D. Marine; hyperosmotic
In the BGS field, which of the following establishes the broad duties that businesses must perform to retain society's support?
A) Mercantilism B) Laissez-faire agreement C) Social contract D) Countervailing force
Base pairs in DNA are held together by ________ bonds.
A. polar covalent B. hydrogen C. peptide D. sulfhydryl E. nonpolar covalent