The soil structure resulting from the castings of earthworms
A) improves the infiltration and aeration of soil.
B) decreases the infiltration and aeration of soil.
C) decreases the nutrient-holding capacity of soil.
D) improves the nutrient-holding capacity but decreases the aeration of soil.
A
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A) a subduction zone B) mountain ranges and active volcanoes C) rift valleys D) the world's most powerful earthquakes E) deep trenches
Which animal below is a mammal?
a. dinosaur b. bird c. frog d. turtle e. horse
In which order do the following processes typically occur to loosen, pick up, and move a sediment particle?
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Before the northern part of the Rocky Mountain Region was part of Canada, the territory was controlled by who?
A) France B) The Hudson's Bay Company C) The Northern Rockies Company D) Russia