population
Species within the class Cephalaspidomorphi, which includes the lampreys, comprise the smallest number of species among vertebrates, with around 38 recognized species.
Biosphere contains the fewest number of species compared to community and population.
The order of the Monotremata contains the fewest species, with only five extant species. These species include the platypus and four species of echidnas.
Domain contains the fewest number of categories, with only three domains recognized in biological classification: Bacteria, Archaea, and Eukarya.
Population
Which contains the fewest data values
The y chromosome, which only contains a few hundred genes.
Anarctica
Europe has the fewest number of amphibians.
The exosphere.
troposhere
by the number of species it contains