please..Identify the dependent and independent variables in the following:?

Question

a) the rate of oxygen production for yeast cells growing with and without a respiratory inhibitor compound(cyanide).
b) the number of white tigers observed for 25 years
c) the dry weight of pea plants grown with and without bacteria that fix nitrogen in pea roots.

Answer 1

The independent variable is manipulated by the experimenter. The dependent variable is the observed result.

a) Independent variable: respiratory inhibitor compound(cyanide). Dependent variable: rate of oxygen production for yeast cells.

b) Independent variable: unspecified. Dependent variable: number of white tigers observed for 25 years

c) Independent variable: dry weight of pea plants. Dependent variable: bacteria that fix nitrogen in pea roots.

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Cheers,
Bruce