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.
1 An ant will have a pinched waist that is easily recognized. Termites, on the other hand, have a much thicker waist. 2  The flying ants antennae are bent in the center while a flying termiteâs antennae look straighter to the human eye.  Both the ant and the termite have two sets of wings, four in total.