Final answer:
The dependent variable in this experiment is the number of plants grown in the ocean, influenced by CO2 levels.
Explanation:
Dependent variable: Number of plants.
Dependent variables are the outcomes influenced by the independent variable, which in this case is the CO2 levels in ocean water. The number of plants that can grow in the ocean is what the scientist is measuring based on the varying CO2 levels.
Example: If the scientist observes that as CO2 levels increase, the number of plants decreases, then the number of plants is the dependent variable.
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