Causes of tuberculosis. Tuberculosis (TB) is caused by a type of bacterium called Mycobacterium tuberculosis. The condition is spread when a person with an active TB infection in their lungs coughs or sneezes and someone else inhales the expelled droplets, which contain TB bacteria.Although it is spread in a similar way to a cold or the flu, TB is not as contagious.owever, in some cases the bacteria infect the body but don't cause any symptoms (latent TB), or the infection begins to cause symptoms within weeks or months (active TB).
These 10 animal facts will amaze you. A unicellular organism is any life form that consists of just a single cell. This group includes most life on Earth, with bacteria serving as the majority. The main groups of single celled life are bacteria, archaea (both prokaryotes), and the eukaryota (eukaryotes).
Euglena is one of the most studied unicellular organisms. Scientists do a variety of work with Euglena to learn about its life cycle and habits. Euglena are unicellular flagellate protists. This means they are composed of one cell and use a whip-like tail known as a flagellum (the plural is flagella) to move.Euglena are a green algae found in fresh and salt water, as well as quiet pools of water.nicellular Organisms Defined. Unicellular organisms are composed of a single cell, unlike multicellular organisms that are made of many cells. This means that they each live and carry out all of their life processes as one single cell.