Question

identify the independent variable and dependent variable in this experiment. the species of algae the amount of oxygen in the tanks independent variable dependent variable

Explanation:

The independent variable is the factor that is changed or controlled in an experiment. Here, the species of algae can be chosen and manipulated by the experimenter. The dependent variable is the factor that is measured and is expected to change due to the independent variable. The amount of oxygen in the tanks is likely to vary depending on the species of algae, so it is the dependent variable.

Answer:

Independent variable: the species of algae
Dependent variable: the amount of oxygen in the tanks