Know that the classification system consists of a hierarchy of domain, kingdom, phylum, class, order, family, genus and species.

Understand the limitations of the definition of a species as a group of organisms with similar characteristics that interbreed to produce fertile offspring.

Understand why it is often difficult to assign organisms to any one species or to identify new species.

Understand how gel electrophoresis can be used to distinguish between species and determine evolutionary relationships.

Know that DNA sequencing and bioinformatics can be used to distinguish between species and determine evolutionary relationships.

Understand the role of scientific journals, the peer review process and scientific conferences in validating new evidence supporting the accepted scientific theory of evolution.

Understand the evidence for the three-domain model of classification as an alternative to the five-kingdom model and the role of the scientific community in validating this evidence.