to model bacterial cells agar cubes were used. Agar is a material that absorbs substances from its surroundings. The agar contained an indicator dye and dilute sodium hydroxide (an alkali). The indicator. dye is pink at a pH greater than 8, but becomes colourless when pH falls below 8. Figure 1 shows an agar block as well as some of the other equipment used in the experiment. Describe a method that the student could have used in her experiment answer
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