Respirometers were set up that contained yeast and 2% glucose solution. Each respirometer was placed at a different temperature. The height of the bubble contained in the respirometer was measured every 5 minutes for 20 minutes. What is the independent variable in this experiment?

The independent variable in the respiration experiment would be the temperature.

In experiments, independent variables are the variables that are supplied by the experimenters and varied across different groups in the study. In other words, independent variables are the variable whose effects is to be determined in any experimental set ups.

In the case of the respiration experiment, the variable that is supplied and varied across groups is temperature. Each respirometer was placed at different temperatures in order to see the effect the variation would have on the respiration rate.

More on independent variables can be found here: link

Temperature is the independent variable in this experiment

Explanation:

A respirometer is a tool used to calculate the rate of breathing of a living organism by calculating the amount of exchange of oxygen and/or carbon dioxide.

When the yeast cells are given sugar in an aerobic (oxygen-containing) environment, then the yeast.

There would be an air bubble at the tip of the respirometer, and our dependent variable is the difference in the duration of the bubble, i.e. incubate in a warm water bath at body temperature (37 ° C) for about 20 minutes.

im pretty sure its b