Which of the following items would improve the experiment? Add more types of plants Test one plant with no fertilizer Use different soils for each plant Expose all six plants to green light

Um, I'd say add more types of plants cause different plants react differently to things, I guess?

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.