According to your text, about what percent of the populations of a number of countries in Africa and Asia are engaged in the agricultural sector?
A) 15%
B) 25%
C) 50%
D) 70%
E) 90%
D
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Why doesn't the sodium atom gain seven electrons so that its third shell becomes the filled outermost shell?
A. Only six additional electrons are required to fill the outermost shell of sodium. B. It would be too difficult for another atom to lose seven electrons. C. Sodium's nuclear charge is not strong enough to hold that many more electrons. D. In gaining seven more electrons, sodium's fourth outer shell becomes filled.
Most marine organisms have an internal temperature very close to that of their surroundings. They are known as ____ organisms
A) poikilothermic B) endothermic C) homeothermic D) ectothermic
Identify and describe the major fluxes of the hydrologic cycle
What will be an ideal response?
Which of the following is the smallest grain size category for clastic particles?
a. sand b. gravel c. silt d. regolith e. clay