Figure 54.4 -After Looking at the Experiment in Figure 54.4,what Can Be

question 10

Multiple Choice

Figure 54.4
-After looking at the experiment in Figure 54.4,what can be said about productivity in marine ecosystems?

• A)Nothing can be said based on this information.
• B)Marine organisms break down iron for energy and thus for productivity.
• C)Iron can be a limiting nutrient in productivity.
• D)Productivity increases when chlorophyll a is added.

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