Friday, May 14, 2010

Cellular respiration ( variable and the control)?

For the three sections of the experiment, identify the variable and the control:


a. cell respiration rate of germinating peas vs. cellular respiration rate of dry peas at the same temperature.


b. cell respiration rate of germinating peas at one temperature vs. cell respiration rate of germinating peas at a different temperature


c. cell respiration rate of dry peas at one temperature vs. cell respiration rate of dry peas at a different temperature





Please Help...Cellular respiration ( variable and the control)?
In all three experiments, you are looking at the effect of germinating or dry seed and temperature on the rate of cellular respiration. Your control is the investigated factor that doesn`t change, and your variable is the factor you are altering in that particular experiment. So, your control and variable in each of the experiments is:


a. control - temperature, variable - dry or germinating


b. control - germinating, variable - temperature


c. control - dry, variable - temperatureCellular respiration ( variable and the control)?
Variable is what changes, the control is what is kept the same. Usually, the base conditions are the control, and if you do something wacky that is considered a variable.





So usually something like room temperature would be a control, and hot or cold temps would be variables. With the first one, you would probably use dry as control, and germinating as your variable (that one is a tricky one)!

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