Which of the following human threats to the ocean has resulted in making it more difficult for corals to build skeletons?
A) Acidification
B) Aquaculture
C) Increased ocean warming
D) Overfishing
E) Sea level rise
A
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Manganese and phosphorite nodules can only be observed in areas of high sediment accumulation. Indicate whether the statement is true or false
What is the greatest source of oxygen in deep water?
a. The respiration from bacteria b. The lack of large quantities of organisms c. Chemosynthesis d. Polar waters that have sunk from the surface
Howie lets a dart swing against an upright block of wood. The greatest force of impact on the block occurs when the dart
A. glances off to the side. B. bounces. C. sticks. D. none of the above
The spatial distribution of air quality nonattainment areas in the US is a result of
A) emissions. B) population. C) geographical features. D) emissions, population, geographical features and meteorological conditions.