Biology, Eighth Edition (Raven)

Chapter 58: The Biosphere

Post Test

Global ocean currents are largely caused by: (p.1214 )
A)the rotation of the Earth.
B)salinity and density gradients within the oceans.
C)surface winds.
D)all of the above
Rank the following biomes according to decreasing biodiversity. (p. 1218 - 1220)
A)savannah > taiga > desert > temperate grassland > temperate deciduous forest
B)savannah > temperate deciduous forest > temperate grassland > taiga > desert
C)temperate deciduous forest > savannah > taiga > desert > temperate grassland
D)temperate deciduous forest > temperate grassland > savannah > taiga > desert
A consequence of thermal stratification of lakes is that: (p 1222)
A)the dissolved oxygen at the bottom level of the lake can be depleted by the end of summer.
B)light does not penetrate to any great depth.
C)fish such as trout survive very well.
D)both a and b
E)all of the above
The open oceans have low primary productivity because: (p. 1223)
A)the ocean currents are too strong for the phytoplankton.
B)nutrients for phytoplankton are in very low concentrations at the surface.
C)pollution has killed most of the phytoplankton.
D)all of the above
Why is diffuse pollution (e.g. runoff of chemicals into the sewer system) more difficult to deal with than point source pollution? (p. 1227)
A)It has many different, small, independent sources.
B)Regulation of diffuse pollution will be ineffective.
C)It depends on changing the behavior of individuals.
D)Many different chemicals are probably involved.
E)all of the above
What are the other greenhouse gases apart from carbon dioxide? (p. 1232)
A)carbon dioxide is the only one
B)methane, nitrous oxide
C)nitrous oxide, ozone
E)hydrogen sulfide
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