A U-shaped valley (in cross section) is characteristic of glacial erosion.
Answer the following statement true (T) or false (F)
True
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Which nation in Southeast Asia remained uncolonized throughout the colonial period?
A) Laos B) Cambodia C) Burma D) Thailand E) Vietnam
In Wegener's time, scientists thought that the occurrence of fossils of the same organism in two different, disconnected continents was proof that ________
A) the weather patterns had changed over time such that some organisms could be blown by the wind from one place to another. B) there were icebergs in the Atlantic Ocean that could carry organisms from Africa to South America C) birds flew between the continents and carried the organisms with them. D) there had once been land bridges separating the continents
Nh3 + h2o ? nh4+ + ho-
What will be an ideal response?
What is the primary cause of oxygen depletion in the disphotic zone?
a. photosynthesis b. chemosynthesis c. primary production d. buffering reactions e. heterotrophic respiration