A bee carrying pollen from one flower to another represents what kind of natural function?
A. ecosystem service
B. resource commodity
C. greenhouse effect
D. scientific model
Answer: A
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A glacier covering at least 50,000 km2 and unconfined by topography:a
ice cap d. cirque b. continental glacier e. valley glacier c. moraine
The gradient of a stream is
A. the volume of water passing a point per unit time. B. steepest near the stream's head (upper end). C. the product of velocity times width times depth. D. steepest near the stream's mouth (lower end).
In seed plants, what stage in the alternation of generations is largest?
A) diploid gametophyte B) haploid gametophyte C) diploid sporophyte D) haploid sporophyte
A country's level of wealth is not the only factor determining the degree of automobile dependency in cities. ________ is also an important factor
A) Availability of transportation alternatives B) Whether a country is developed or developing C) Access to freeways D) Extent of urban decay E) Availability of hybrid vehicles