his" bacteria Mathods Bacterial his strains are mixed with enzymes (which have the ability to convert compounds into Some of the bacteria are also miked with the chemical to be tested for mutagenic actvity potental mutagens. 3 The bacteria are then plated on medium that lacks hestidine Incubate Incubate Results Control plate (no chemical) Treatment plate (chemical added) Bacterial colonies that appear on the plates have undergone a ha hs* mutation. Conclusion: Any chemical that significantly increases the number of colonies appearing on the treatment plate is mutagenic and therefore probably also carcinogenic.
Bacterial Morphology
The bacteria are prokaryotic organisms that are single-celled, and are found to exist as free-living and possess a microscopic size. The morphology is found to vary in the bacteria, where some of them are identified as individual organisms and the others are detected as colonies. The size and shape of the bacterial cell also represent its morphology.
Bacterial cell structure
Bacteria are single-celled, tiny creatures that may enter healthy tissues and grow rapidly. Bacteria are microscopic organisms that are tiny and unicellular. These are members of the prokaryote kingdom. They live in water, air, soil, and all-natural environments. They are used in industrial and therapeutic processes, and they support a wide range of plant and animal life. The first organism to appear on the planet. Bacteria-like creatures are the oldest known fossils. Bacteria can consume a wide range of organic and inorganic elements, and some may even survive in harsh conditions.
What conclusion would you draw if the numbers of bacterial colonies in Figure 18.22 were the same on the control plate and the treatment plate? Explain your reasoning.
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