Answer: Positive phototaxis
Which of the following terms refers to a bacterium moving towards a light source?

Two types of positive phototaxis are observed in prokaryotes: scotophobotaxis is observable as the movement of a bacterium out of the area illuminated by a microscope when entering darkness signals the cell to reverse direction and reenter the light; a second type of positive phototaxis is true phototaxis which is a directed movement up a gradient to an increasing amount of light.

Chemotaxis (from chemo-+ taxis) is the movement of an organism in response to a chemical stimulus. Somatic cells bacteria and other single-cell or multicellular organisms direct their movements according to certain chemicals in their environment. This is important for bacteria to find food (e.g. glucose) by swimming toward the highest concentration of food molecules or to flee from poisons ...

In biology depolarization (British English: Depolarisation) is a change within a cell during which the cell undergoes a shift in electric charge distribution resulting in less negative charge inside the cell. Depolarization is essential to the function of many cells communication between cells and the overall physiology of an organism.

In molecular biology and genetics transformation is the genetic alteration of a cell resulting from the direct uptake and incorporation of exogenous genetic material from its surroundings through the cell membrane(s). For transformation to tak...

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