Genus:-

• Genus: It is the aggregates of closely related species.
  E.g., potato, tomato & brinjal are species of genus Solanum, Lion, leopard, & tiger are species of the genus Panthera.
• This genus differs from the genus Felis (genus of cats).

Family:-

• It is a group of closely related genera. E.g., Family Solanaceae includes Genus Solanum, Genus Petunia and Genus Datum.Family Felidae includes Genus Pauthera and Genus Feis.

Order:-

• It is the assemblage of related families. E.g., Order Polymouiales includes Family Couvolvulaceae and Family Solauaceae.
• Order Carnivora includes Family Felidae & Family Canidae