The 2cvs are no hablas ingles
Independent Variables are the factors that are tested by beingvaried by the experimenter.
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Microbial life is important because this is bacteria. these bacteria's supply health to humans and animals. even though they also supply sickness. also these microbial life forms are the cells in us. its the oxygen in the air, its the gravity. it is everything that defines science except we cant see it. hope it helps, tag me if you need help, and plz choose brainliest
Explanation:
B. Spindle fibers begin to form.