Eutrophication is a condition of natural nutrient enrichment of a shallow lake, estuary or slow-moving stream
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During the twentieth century, the Earth's atmospheric temperature increased by about ________ degree(s) Celsius
A) .3 B) 1 C) 2 D) 3
We can deduce from the examples of popular music, fashionable clothing, and electronic applications around us that the rapid diffusion of popular culture
A) discourages people in different places to adopt different customs. B) depends on modern communication systems. C) is an example of relocation diffusion. D) conserves natural resources. E) always occurs at the expense of folk culture.
The sugars in RNA and DNA are ribose and deoxyribose respectively. Which of the following describes the relationship between these two sugars?
A) In deoxyribose the oxygen lost is from the hydroxyl on C-1 of ribose. B) In deoxyribose the oxygen lost is from the hydroxyl on C-2 of ribose. C) In deoxyribose the oxygen lost is from the hydroxyl on C-3 of ribose. D) In deoxyribose the oxygen lost is from the hydroxyl on C-4 of ribose.
Despite limited precipitation in subarctic climates, subsurfaces are often partially or totally frozen
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