Compared to freshwater fishes, marine fishes ________
A) drink seawater and produce a large volume of urine
B) do not drink seawater in an effort to conserve as much water as possible
C) produce a large volume of dilute urine in an effort to rid their bodies of excess water
D) tend to gain water by osmosis since their internal salt concentration is higher than that of seawater
E) tend to lose water by osmosis since their internal salt concentration is lower than that of seawater
E
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The Earth is tilted at an angle of 23.5° with respect to the plane of its orbit around the sun. Which of the following describes what would happen in middle latitudes if the angle was increased to 40°?
A. hotter summers and colder winters than at present B. cooler summers and milder winters than at present C. hotter summers and milder winters than at present D. cooler summers and colder winters than at present
According to the Köppen system of classifying climates, which of the following climate types has xerophytes?
A. climate A B. climate B C. climate C D. climate D
If global climate change causes rain and temperature patterns to shift dramatically in a region,
A) plate tectonic action may dramatically change. B) ocean levels could suddenly drop. C) the region's biodiversity may change catastrophically. D) the region's biodiversity may suddenly increase.
What is the best description of natural income?
A. renewable resources provided by the earth's natural capital B. nonrenewable resources created by humans C. income based on government subsidies D. excess resources remaining after our ecological footprint E. new and alternative resources created by humans