How is ozone produced in the upper atmosphere?
A. It diffuses from the lower atmosphere.
B. It forms by reaction of oxygen molecules with UV light.
C. It forms by nuclear decomposition of oxygen.
D. It forms by the reaction of nitric dioxide and oxygen.
E. all of the above
Answer: B
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Two species that both have the ability to fly must have evolved from a common ancestor
Indicate whether the statement is true or false
Moving out to the suburbs is associated with
A) becoming a farmer. B) downward social mobility. C) greater economic risk. D) changing employers. E) upward social mobility.
Organisms that dwell in dark caves, in wells, or on the ocean floor often depend on which of the following biogeochemical processes?
A) chemosynthesis B) endogenic processes C) nutrient leaching D) photosynthesis E) nitrogen fixation
Bottle bills ________
A) have not effectively increased recycling rates in states that have them B) are fees paid by beverage companies in certain states C) have been passed in just over half of the states in the U.S. D) usually involve consumers paying a nickel deposit on a beverage container E) have been passed in all 50 states and Puerto Rico