BioArt is a branch of New Media Art that involves creating artworks using biological elements such as living tissue or microorganisms and often involves biotechnology as well. These works are typically created by scientists themselves or by traditional artists working in conjunction with scientists and will often involve laboratories as well as or in place of artist's studios.
Here is an example of BioArt in a petri dish created with florescent bacteria:
Here is an interesting article exploring the aesthetics of BioArt as well as the ethics of using live specimens and living tissue to create art:
Finally, here is a direct link to the BioArt photo gallery accompanying the above article: