What are the potential limiting factors for primary productivity?
a. light and nutrients
b. light and carbon dioxide
c. nutrients and carbon dioxide
d. carbon dioxide and water
e. nutrients and water
a
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The former Yugoslavia has fragmented into how many independent nation-states?
A) seven
B) three
C) four
D) six
E) five
If the water in Well B is contaminated, can groundwater pollution from the waste pit be blamed? Why or why not?
The question is based on Figure 25-3, a map of a hypothetical landscape with an effluent stream flowing from northeast to southwest. Water table contours are drawn at 2-foot intervals and flow lines show the direction of groundwater movement at the top of the zone of saturation. The waste pit in the north was dug down to a depth just slightly above the water table in that location. A fenced pasture for grazing livestock is in the east. Two wells are shown, and the locations of three water quality sampling sites along the stream are indicated. What will be an ideal response?
The most important source rocks for fuels we use today are igneous rocks
a. True b. False
Species richness is affected by many variables. As one travels to higher latitudes, one would expect ________
A) the number of species to increase B) population viability to increase C) the number of species to be maintained D) other factors to be more important than latitude E) the number of species to decrease