The essay examines different cases of bioart, which, by combining biological materials and technological processes, present new forms of biological assemblages. For example, such collectives as Tissue Culture and Art Project and Art Orienté Objet, artists Eduardo Kac, ORLAN, Maja Smrekar and Robertina Šebjanič invent new forms of hybridization and symbiotic forms of cohabitation. The essay will question what is so specific in bioart and in what respect does it differ from scientific research conducted in laboratories, or fromsome biological phenomena found in the natural world. My hypothesis is that bioart introduces a specific mode of bio-performativity and creates a unique moment of bio-presence: it does not represent but presents and pro...