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 are to be paid by the passenger. Thanks to the booming economy but due to disparities in income many types of taxis have come up. For example, in Delhi there are 5 types of taxi. auto rickshaws- which are the cheapest form of taxi-, Normal Taxis, Radio Cabs, White Taxis and Tourist Taxis. In posher areas like Noida and Gurgaon auto rickshaws are banned thus giving the taxis a monopoly. Chandigarh also has a well established system of modern radio cabs using cars like Tata Indigo/Indigo Marina, Fiat Siena and Maruti Esteem. Kolkata has also got many "No Refusal" taxis