Eutrophication occurs when
A) there is a decrease in available nutrients in an ecosystem.
B) there are no nutrients in an ecosystem.
C) there is a minimum amount of nutrients in an ecosystem for survival.
D) there is an increase in the nutrient content of an ecosystem.
Correct Answer:
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Q50: Refer to the figures.
Figure 1
Q51: Refer to the figures.
Figure 1
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Figure 2
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Q60: Refer to the figure.
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