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
Taxis in India horse wagons. The black and yellow Fiat taxis in Mumbai, are integral part of the city's heritage and have been depicted in numerous Bollywood movies. These metered taxis ply throughout Mumbai and have monopoly from Bandra to Churchgate on the Western line and Sion to Chatrapati Shivaji Terminus on the Central line. Beyond Sion and Bandra auto rickshaws are not allowed and one has to hire a taxi. However, between Sion to Thane and Bandra to Bhayandar, Taxis and autorickshaws ply. A mechanical meter decides the fare and is proportional to the distance traveled. There are an estimated 52,000–55,000 taxicabs