Yes, populations evolve. Individuals/genes are selected.
The smallest unit of electric charge that occurs in ordinary matter is the charge of an electron, which is approximately -1.6 x 10^-19 coulombs.
The smallest biological unit that can evolve over time is an individual organism, typically a unicellular organism like bacteria or archaea. These organisms can undergo genetic mutations and natural selection, leading to the evolution of their populations over generations.
Evolution is defined as a change in allele frequencies over time. Since individuals have only the set of alleles that they're born with, an individual cannot evolve. This leaves the population as the smallest unit that can evolve.
Evolution can occur at the level of populations rather than individuals. Changes in allele frequencies within a population over generations is the basis of evolution, and this can happen through mechanisms like natural selection, genetic drift, and gene flow.
The smallest unit of classification in taxonomy is a species.
If it is a molecular compound, the smallest unit is called a molecule. If it is an ionic compound, the smallest unit is called a formula unit.
The smallest biological unit that can evolve over time is a population. Evolution is the change in the heritable characteristics of a population over generations. Individuals do not evolve, but rather the frequency of traits within a population changes over time.
A cell is the smallest unit of an organism
A molecule is a compounds smallest unit
Smallest unit of a compound is a molecule.
This smallest unit is the atom.