Well , the studenthas not done justice to the question technically. He/she classified examples of cells entirely on other basis other than the observationsseen on the prepared microscopicslides
<h3>Prepared microscopic slide</h3>
Prepared microscopic slides are set of slides that have been previously mounted by an individual who is a professional in the field.
It process involve immersing the sample ( either before or after fixation or mounting) in a dye solution and then rinsing and observing the sample under a microscope.
Catalase is an enzyme in the liver that breaks down harmful hydrogen peroxide into oxygen and water. When this reaction occurs, oxygen gas bubbles escape and create foam.