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Positive chemotaxis is movement toward the source of the chemical stimulus (along the chemical concentration gradient in air or water); negative chemotaxis is movement away from the source. The phenomenon is known to exist in a number of microorganisms and invertebrates.
You won't believe these 10 facts about people. Chemotaxis is movement of small organisms and single cells in response to chemical signals in the surrounding environment.uring fetal development, chemotaxis also plays a role in the movement of cells as the organism develops; budding nerve cells, for example, start to distribute themselves to map out the nervous system.