Use the Following Figure to Answer the Question

question 30

Multiple Choice

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.

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Definitions:

Colonialism

The practice of acquiring full or partial control over another country, occupying it with settlers, and exploiting it economically, often associated with imperialism.

Poverty

A condition where individuals lack sufficient income or resources to achieve a minimum standard of living.

Children

Young human beings below the age of puberty or below the legal age of majority.

Democracy

In a democracy, citizens exercise a high degree of control over the state. They do this mainly by choosing representatives in regular, competitive elections.