Taxis response is to move towards or away from the stimulus. If the organism moves towards the stimulus the taxis is positive, while if it moves away the taxis is negative. For example, flagellate protozoans of the genus "Euglena" move towards a light source. This reaction or behaviour is called "positive phototaxis", since phototaxis refers to a response to light and the organism is moving towards the stimulus. Many types of taxis have been identified, including: Depending on the type of sensory organs present, a taxis can be classified as a "klinotaxis", where an organism continuously samples the environment to determine
Thurn and Taxis line of succession Thurn and Taxis line of succession The House of Thurn and Taxis, a princely dynasty which was sovereign until mediatized in 1806 and its noble status de-recognized following the fall of the German Empire in 1918, exists through several extant lines descending from Alexander Ferdinand, 3rd Prince of Thurn and Taxis. The rule of succession is agnatic primogeniture, which only allowed males to succeed to the main princely title so long as male members of the family survive. The current Head of the House of Thurn and Taxis is Albert, 12th Prince of Thurn and Taxis, whose historic style is