A formal region is defined by a limited number of related characteristics. For example, the Sahel region of Africa is a d esert area characterized by specific climate, vegetation, and land use patterns.
Answer: Formal Regions
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The primary reason for a conservation approach for remaining oil reserves is ________
A) these resources are very hard to mine B) the rate at which we are extracting oil is thousands of times faster than the rate of its formation C) developing countries are using less, making a greater resource available for the industrialized nations D) industry is taking an ever-increasing share of these resources E) the ever-increasing higher costs of oil
In general, abiotic regulatory factors tend to be ________ while biotic factors tend to be ________.
A. Interspecific; density-independent B. Intraspecific; interspecific C. Density-independent; density-dependent D. Interspecific; intraspecific E. Density-dependent; density-independent
According to Figure 17.9, which of the following materials would you expect to be the best confining bed?
A) granite B) gravel C) fractured basalt D) sand
Consumption in phytoplankton usually exceeds carbohydrate production which is why we end up with
oxygen. Indicate whether the statement is true or false.