Plankton are categorized by their visibility or by the methods used to collect them
a. True
b. False
False
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Resources are ________
A) infinite B) available in sufficient quantities to sustain all of our futures C) available in ample quantities D) finite E) used at a slow rate so that they will last forever
Oceans
A) exchange energy with the atmosphere. B) transfer heat toward the poles. C) are a source of atmospheric water vapor. D) all of the above E) none of the above
An artesian aquifer occurs where ________
A) a water-bearing layer is trapped between two layers that are less permeable B) granite is overlain by a sandy substrate, allowing percolation into the aquifer C) a well is dug through layers of sand and gravel into the water table D) several aquifers have merged E) a water-bearing porous layer of rock, sand, or gravel has accumulated groundwater over a long period of time
Which of the following is NOT a problem of subsistence agriculture?
A) It is subject to soil and precipitation variability. B) a lack of tools and high yielding seed C) Non-food crops, such as sugar and jute, become attractive to subsistence farmers due to the high prices they can get on the export market. D) Subsistence farmers can often barely provide for their families. E) Subsistence farmers suffer from a lack of capital.