The reaction of oxygen with an unsaturated fatty acid gives which of the following products?
A) a phenol
B) a hydroperoxide
C) vitamin E
D) none of the above
B
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Most waves in the electromagnetic spectrum are
A. invisible. B. blue light. C. red light. D. green light.
Limestone is most intensely weathered in arid environments
Indicate whether the statement is true or false.
Biofuels ________
A) could not supply an alternative fuel to gasoline B) can be created by microbial action or burned directly as wood or dung C) requires fossil fuel input to produce D) produces no greenhouse gases when burned E) is a form of fossil fuel
Rock deep within the Earth is ________ and ________.
A. cool; heat flows in toward Earth's center B. unknown; we can only guess about conditions there C. hot; heat flows inward toward Earth's center. D. the same temperature throughout the earth; heat flow is not an important consideration E. hot; heat flows out toward Earth's surface