Scientific research on microorganisms requires more than conventional research ideas and tools. When it comes to tools, many people will definitely think of microscopes first. But microscopes are only suitable for observation. If you want to perform biochemical analysis, the role of agar is more important. If you have been In the microbiology laboratory, you will find that the most commonly used experimental tool is a petri dish, which is covered with a layer of nutrient-rich agar. Each bacteria can grow on the surface of the agar alone with a visible flora. Each flora It contains thousands of exactly the same bacteria, which is called a "clone" in biological terms. Because agar is semi-solid, the location of the bacteria is fixed, and it is impossible to move freely between the flora. It is equivalent to cloning and expanding a bacterium to a large enough amount without being contaminated by other bacteria. Only in this way, scientists can perform biochemical analysis on it. This text mainly states:. ['Microscopy has a limited role in microbiological research.', 'Agar plays an important role in biochemical analysis.', '"Cloning" technology makes the biochemical analysis more operable.', 'How do scientists perform biochemical analysis in the laboratory.']