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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.

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