Keep in mind that properly vented ventilation fans also suck a lot of heated air out of your house. A remedy is to install a heat-exchange ventilator fan. These fans use warm, outgoing air to heat cooler, incoming replacement air.
The size of a typical bacterial cell is 0.5-5.0 micrometers, a average human cell is 10 micrometers. 8 people found this useful.
Check the organism's size. One of the quickest ways to tell the difference between a bacterium and a virus is to determine whether you can see it with a regular microscope. If you can see it, it is not a virus. Bacteria are single-celled organisms that can live either inside or outside other cells. 2  They can survive without a cellular host. 3  Viruses, on the other hand, are only intracellular organisms, meaning that they infiltrate the host cell and live inside the cell.