Ex situ conservation means 'offsite conservation'. It is the process of protecting endangered species of plants and animals by removing it from an unsafe or threatened habitat and placing it or part of it under the care of humans. Botanical garden serve as ex situ conservation of germplasm of different plants, to maintain rare and endemic plant species and also to provide recreation and knowledge about plants to a comman man.
These organisms also differ in size, color, habitat, physiology, and morphology.
Biologists have developed certain rules and principles supplementary which are helpful in the identification, nomenclature, and classification of organisms.