Question

were added for this assignment. where plants and aquatic animals are starved of oxygen and die. cyanobacteria growth is believed to be affected by the increased use of fertilizers that run - off into lakes and rivers. with so many different types of fertilizers, it is vital to determine which ones are causing the most growth, to avoid or limit their use. which of the following is the most likely independent variable in this study? different lakes different water temperatures rate of cyanobacteria growth different fertilizers

Explanation:

To determine the independent variable, we recall that the independent variable is the factor manipulated to observe its effect on the dependent variable. Here, the study aims to see how different fertilizers affect cyanobacteria growth. So the independent variable should be the factor being changed (different fertilizers), while the dependent variable is the outcome (rate of cyanobacteria growth). The other options (different lakes, different water temperatures) are not the main manipulated factor here.

Answer:

different fertilizers