Written By: Plasmid, in microbiology, an extrachromosomal genetic element that occurs in many bacterial strains. Plasmids are circular deoxyribonucleic acid (DNA) molecules that replicate independently of the bacterial chromosome. They are not essential for the bacterium but may confer a selective advantage.
A gnat /ËnÃ¦t/ is any of many species of tiny flying insects in the Dipterid suborder Nematocera, especially those in the families Mycetophilidae, Anisopodidae and Sciaridae. They can be both biting and non-biting. Most often they fly in large flocks resembling clouds.
Potted plants can be breeding grounds for gnats, especially the pesky fungus gnat. What's worse is that these annoying insects can be incredibly prolific during their rather short lifespans, generally only living a single week as an adult gnat. However, during this week, the gnat often lays up to 200 eggs.