Use the following figure to answer the question.

After looking at the experiment in the figure, what can be concluded 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.

Question

Use the following figure to answer the question.

After looking at the experiment in the figure, what can be concluded 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.

Quizplus · Accepted Answer

The figure shows that productivity in the marine ecosystem increased with the addition of iron. This suggests that iron may be a limiting nutrient in productivity, meaning that the availability of iron could impact the growth and reproduction of marine organisms. Therefore, choice C is the best answer. Choices A, B, and D are not supported by the information provided in the figure.

Use the Following Figure to Answer the Question