Question

explain how some microbes are so large that they are visible

Answer 1

To be visible to the naked eye , the microbes should be at least 100 micrometers in length .most of the bacteria are from size 0.2 micrometers to 1 micrometer.

One of the exception to this is the Thiomargarita namibiensis , which have a size ranging from 200 - 300 micrometers .

The reason for this large size is that the cytoplasm of the cells are located at the periphery of the cell, while the center of the cells occupy the central part of the cells.

These vacoules swells up when they store nitrate or sulfide during the unfavourable conditions. This swelling actually accounts for the record holding size of the cells .