Question

the second tube is an example of a negative control. it lacks the organism we think will respire, thus allowing us to make sure the organism itself is having an effect. all other variables in this experiment are standardized (size of the tube, size of the pipet, amount/volume of the control item and organism).
true
false

Explanation:

A negative - control in an experiment lacks the variable of interest (in this case, the organism thought to respire). By standardizing other variables, it helps determine if the organism itself is having an effect. The description in the statement aligns with the concept of a negative - control.

Answer:

True