Answer:
a. IV - Different Colored Light Bulbs used on tomato plants
b. DV - Growth, and effects that occur to plant
c. Control = The 5th plant that goes under a typical white light bulb.
d. 3 Constants Include:
-Amount of time plants are under each light (12 hr period)
-Same amount of water given to each plant
-Same type and amount of soil given to each plant.
