Sort the variables of these three studies based on whether they are independent or dependent variables.

Question

Study 1: the effect of light on flowering patterns of plants
Study 2: the effect of penicillin on the growth of E. coli
Study 3: the effect of progesterone on the ovulation of rats

Answer 1

Study 1:
- Independent variable: light
- Dependent variable: flowering patterns of plants

Study 2:
- Independent variable: penicillin
- Dependent variable: growth of E. coli

Study 3:
- Independent variable: progesterone
- Dependent variable: ovulation of rats