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.
Answer: If you have gnats in the house, it usually means the presence of one or both of these small flies: FUNGUS GNATS. If the flies are small, black, and flying around windows or potted plants; then they are probably fungus gnats.These flies are the most common small fly in houses. Question: I am experiencing small black flies in my home. 2  I notice them in the bathroom and on the window sills. 3  We recently bought two new house plants and it seems that most of the flies are in the same room. 4  I have done research, I think they are gnats or fruit flies (no fruits lying exposed).