Ineed this answer asap i don't really know how the points work but i set the amount to 20. james took two pea plants, placing one in a dark closet and the other on a sunny window sill both are located in air-conditioned rooms. he then measured the growth of the pea plants after a week. in this experiment, the dark closet is a( 1. dependent variable 2. constant 3. control 4. independent variable