A farm field that has used only inorganic fertilizer for the past 20 years is most likely to have
A) fewer soil organisms and less soil structure but increased nutrient holding capacity.
B) fewer soil organisms, less soil structure, and decreased nutrient holding capacity.
C) more soil organisms, more soil structure, and increased nutrient holding capacity.
D) more soil organisms, less soil structure, and decreased nutrient holding capacity.
B
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A valid hypothesis must be
A. capable of repeating by other investigators. B. testable. C. more than an educated guess. D. all of the above
Neurons that carry messages from the central nervous system to muscles or organs are
A) sensory neurons. B) interneurons. C) motor neurons. D) both B and C
A(n) ________ fault has not experienced movement in the last 2 million years
Fill in the blank(s) with correct word
Balkanization refers to
A) the creation of nation-states in southeastern Europe. B) the breakdown of a state due to conflicts among ethnicities. C) a small geographic area that cannot successfully be organized into states. D) ethnic cleansing. E) religions splintering into opposing groups.