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-und-Taxis Post association came into force on 1 July 1850. On 6 April 1850, the Thurn-und-Taxis Post joined the German-Austrian Postal Association, which was greeted with negative reactions from the government of the Kingdom of Prussia. Above all, Otto von Bismarck, as a representative of the German Confederation in Frankfurt am Main, was disparaged. Beginning on 1 January 1852, the Thurn-und-Taxis Post postage stamp was available in two variants: Kreuzer and Groschen. After the Prussian victory in the Austro-Prussian War, the Prussians occupied the Free City of Frankfurt and the Thurn-und-Taxis Post's headquarters. The Thurn-und-Taxis Post transferred its postal system contracts to