PLEASE HELP WILL MARK BRAINLIST WHEN I CAN. Why is it important that you keep two variables constant (such as light level and color) while you're testing how a third variable(CO2 level) affects photosynthesis

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

Lactic acid and energy are produced in muscle cells during choose 1 aerobic respiration cellular respiration anaerobic respiration cellular division

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