The emergence of multicellularity, requiring complex interactions between different groups of individual cells for metabolic and physiological benefits, is a great success in the history of biology. While multicellularity is commonly associated with eukaryotes, the relatively recent discovery of multicellular bacteria in sediments has added perplexity to the nature and organization of these cells. Remarkably, the interactions in this group of bacteria, known as cable bacteria, occur via electricity.
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Source: Phys.org