What do excess organic wastes and plant nutrients deplete from water?
A. nitrogen
B. oxygen
C. particulate matter
D. minerals
E. iron
Answer: B
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Where on the following world map are the lowest salinities?
A) A
B) B
C) C
D) D
Determine where the phrase belongs and select that letter. Which letter best matches the phrase most damaging.
Determine where the phrase belongs and select that letter. Which letter best matches the phrase most damaging.
From the time accurate charts became available in the late 1700s, observers noticed the remarkable coincidence of the shape of the Atlantic coasts of Africa and South America. What additional evidence strengthened the idea of continental drift with regards to geographic fit?
According to the World Health Organization, the root cause placing people at the highest risk of disease is
A) infectious disease. B) cancer. C) heart disease. D) poverty.