The biological definition of 'race' corresponds to all of the following except: a. the genealogical species concept; b. the idea that subgroups within the same species can be distinguished from each other by ancestry; c. there is a natural hierarchy of groups within a species from 'lowest' to 'highest' forms; d. it should be possible to identify races on the basis of shared allele frequencies among populations; e. races within a species are not reproductively isolated from each other.

Verified step by step guidance

1. Understand the concept of 'race' in biological terms, which generally refers to subgroups within a species that can be distinguished by genetic differences and common ancestry.
2. Review the genealogical species concept, which emphasizes the importance of common ancestry in defining species but does not necessarily apply to the concept of 'race' within those species.
3. Analyze the statement about the natural hierarchy of groups within a species, recognizing that biological science does not support the idea of a 'natural hierarchy' from 'lowest' to 'highest' forms as this implies a value judgment not applicable in scientific terms.
4. Consider the role of allele frequencies in identifying races, noting that races can often be characterized by differences in the frequency of certain alleles, though this is just one of many tools used to distinguish subgroups.
5. Examine the reproductive isolation aspect, understanding that races within a species are typically not reproductively isolated from each other, which differentiates the concept of 'race' from that of 'species' in biological taxonomy.