[Solved] The football we know today is a result of ______. A)alertness B)active search C)building opportunities D)prior knowledge Isopropyl Alcohol: A colorless, flammable chemical compound with a strong odor, commonly used as a disinfectant, solvent, and antiseptic. Specimen Slide: A thin slice of material, such as tissue, mounted on a slide for examination under a microscope. Microscope: An instrument used to view objects that are too small to be seen by the naked eye, magnifying tiny details for study or observation. Substage: A division or phase within a larger stage or process, often indicating a specific part of a broader developmental or operational sequence.