An amino acid is an organic molecule that contains both an amine group and a carboxyl group. At an acidic pH, which structure is most likely?
A. Structure (a)
B. Structure (b)
C. Structure (c)
D. All three structures are equally possible.
Answer: C
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Scientific thinking
A. searches for cause-and-effect relationships. B. is rational thinking. C. both of these D. none of the above
Large sandy areas of mobile sand dunes are called seif dunes
Indicate whether the statement is true or false
All of the following will likely be impacts of global climate change on sea levels except ________
A) greater storm surges B) receding coastlines C) coastal flooding D) salt water intrusion into aquifers E) increasing beach erosion
When making decisions about what safety systems should be required in cars or airplanes, the ___________________ will only approve rules where the estimated cost per life saved is __________ or less.
A. U.S. Senate; $5 million B. U.S. Congress; $2 million C. Environmental Protection Agency; $3 million D. Environmental Regulation Agency; $7 million