What does the line in the following example actually represent?H-H
A. a shared pair of electrons
B. a covalent bond
C. a pair of nonbonding electrons
D. an ionic bond
E. both A and B
Answer: E
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Biomagnification is a process by which pollutant concentrations increase as food is passed up the food chain from lower trophic levels to higher ones
Indicate whether the statement is true or false.
Species extinctions are inevitable so expending resources on combating species loss is pointless
Indicate whether the statement is true or false
Which of the following would produce a nuclear reaction?
A) bombarding uranium-238 with protons B) bombarding uranium-235 with protons C) bombarding uranium-238 with neutrons D) bombarding uranium atoms with electrons E) bombarding uranium-235 with neutrons
With increasing distance from an oceanic ridge,
A. the rocks become younger. B. the rocks become older. C. the rocks' ages alternate between younger and older. D. All of the choices; different patterns occur at different ridges.