A selection of Mechanical calculators: The basic operating principles of mechanical calculators changed little from the end of the 19th century to their obsolescence in the 1970s, though there were many developments in the mechanisms and the materials used.
Post. Share. Bacteriophages are viruses that infect bacteria. A bacteriophage can have a protein tail attached to the capsid (protein coat that envelopes the genetic material), which is used to infect the host bacteria.Scientists have long sought to uncover the structure and function of viruses. bacteriophage can have a protein tail attached to the capsid (protein coat that envelopes the genetic material), which is used to infect the host bacteria.
1. Tuberculosis: The bacteria that cause tuberculosis are called mycobacterium tuberculosis. 2. Bubonic Plague: The bacteria that cause the plague are the yersinia pestis vari â¦ ety.3. Cholera: The bacteria that cause Cholera are the vibrio cholerae bacteria that contaminates food stuff and water.. Bubonic Plague: The bacteria that cause the plague are the yersinia pestis vari â¦ ety. 3. Cholera: The bacteria that cause Cholera are the vibrio cholerae bacteria that contaminates food stuff and water.