What is the most accurate description of a biogeochemical cycle?
A. chemical materials that create energy
B. energy cycles of nonliving things
C. chemical substances cycling in biosphere
D. energy cycles generating elements
E. chemicals necessary for biological functions
C
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The Orinoco Basin is largely located in which two nations?
A) Peru and Brazil B) Brazil and Venezuela C) Argentina and Brazil D) Colombia and Venezuela E) Colombia and Brazil
What was the Arab Spring? What were its root causes? What nations in the region have been the most impacted by the Arab Spring?
What will be an ideal response?
Gymnosperms represent the earliest flowering plants
a. True b. False
Which plate does the westward-moving South American Plate encounter in South America??
A) ?Cocos plate B) ?Juan De Fuca plate C) ?Farallon plate D) ?Nazca plate