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.
A grasshopper is active in the day and a cricket is active in the night. Crickets and grasshoppers look similar, but there are differences. A big difference is that they belong to different families. The grasshopper is an insect of the suborder Caelifera in the order Orthoptera. Crickets, family Gryllidae, are insects somewhat related to grasshoppers and more closely related to katydids or bush crickets (family Tettigoniidae).