Greek ge ges, Earth and taxeos, placement, layout, ordering taxis. Oriented movement of an organism or part of it in relation to terrestrial gravity. It also said geotaxis, geotaxismo, geotactismo, gravitaxismo, geotropism, gravitropism. . . The response to the stimulus of gravity can be negative, or positive, please (the root of a plant growth) against gravity (growth of the stem). There are many other taxias, such as phototaxis, termotaxia, anemotaxia, hidrotaxia
