A soil deficient in humus would ________
A) have unusually low levels of biological activity
B) have many decomposers and be able to hold considerable moisture
C) have no cations
D) have a very low mineral content
E) have a large amount of vegetative detritus at the surface
A
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Most Pleistocene mineral deposits are directly or indirectly related to glaciation. Indicate whether the statement is true or false
What is the Cambrian explosion? Is their appearance sudden? Why is it sudden, or why does it seem
so? What will be an ideal response?
The process of subduction ________
A) is responsible for hurricanes B) is caused by volcanoes C) causes the formation of deep ocean trenches D) occurs when plates pull apart E) occurs when denser ocean crusts slide beneath lighter continental crusts
The Great Migration beginning around 1915 until the1970s and consisted of about 6 million African Americans, who moved out of the South
a. True b. False Indicate whether the statement is true or false