Why do eukaryotes have plasmids?

Eukaryotes can have plasmids as they provide additional genetic advantages, such as carrying genes that confer resistance to antibiotics or toxins, enhancing metabolic capabilities, and facilitating horizontal gene transfer. While plasmids are more commonly associated with prokaryotes, some eukaryotic organisms, particularly fungi and plants, utilize plasmids for genetic engineering and biotechnology applications. This allows for greater adaptability and survival in varied environments. Additionally, plasmids can be used as tools in research and biotechnology for gene cloning and expression.