Bed load is moved by
A) suspension only.
B) traction only.
C) saltation. only.
D) saltation, traction, and suspension
E) both saltation and traction, but not suspension.
E
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Compare and contrast the characteristics of the Pacific coast to the characteristics of the Atlantic coast of the United States
To maintain their bodies' water balance, marine fish ________.
A. excrete salt through their gills, drink water continually, and produce small amounts of urine B. produce small amounts of urine C. excrete salt through their gills and drink water continually D. excrete salt through their gills E. drink water continually
Plant photosynthesis increased the concentration of ____________________ in Earth's early atmosphere
Fill in the blank(s) with correct word
Why are native trees more diverse in North America than in Europe?
A) The larger ice sheets in North America caused more species to go extinct. B) North American trees expanded into mountain ranges during glaciations. C) European trees were trapped between the ice sheet and E-W trending mountain ranges. D) North American trees are all of tropical origin.