Science Fair Project Encyclopedia
Taxis
- The word taxis can also be plural of taxi.
A taxis (plural taxes, pronounced "takseez") is an innate behavioural response to a directional stimulus (a stimulus from a particular direction) whereby the organism either moves toward (positive taxis) or away from (negative taxis) the stimulus, called orientation movement . For example, organisms in the genus of flagellate protozoa Euglena moves towards a light source. Here the directional stimulus is light, and the orientation movement is toward it. This is positive taxis to light, more specifically positive phototaxis .
Other forms of taxis include chemotaxis, mechanotaxis, haptotaxis and durotaxis.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details