Define the following terms that are commonly used describe colonies: 1.  Form -  2.  Elevation -  3.  Margin -

discuss the practical use of colonial morphology and cellular morphology in the identification of bacteria.

In the above figure, it shows the typical propagation rate of a worm. Answer the following two questions: a) why does the start phase show a slow propagation? b) why does the finish phase show a slow propagation

A. Antibiotics, such as gentamicin, are used in media to prevent growth of susceptible microbes. Is gentamicin media a selective, differential or enrichment media? B. Sorbitol is a sugar alcohol that all Escherichia bacteria can normally ferment into an acidic waste compound. This acidic end product is detected by including a pH indicator in the agar and noticing a color change. The strain of Escherichia that is a common food pathogen, E. coli O157:H7, however can not ferment sorbitol. It will grow similar to other E. coli, but not change the agar color. Is sorbitol in nutrient agar a selective, differential or enrichment media?​

Which of the following is false about counting viable cells?  A. CFU(Colony forming unit) are counted instead of individuals cells  B. Only 30-300 CFUs are statistically valid  C. Colonies growing on the plate represent a fraction of the live cells in the original sample  D. You can determine the number of live cells in a broth culture  E. It is necessary to multiply the by CFUs to determine the number of viable cells in the original sample

Elaborate on the advantages of examining colony in an agar plate.