As scientists went deeper into evolutionary history and closer to the base of the tree of life, the harder it became to know how closely related organisms are. (discovermagazine.com)
For another, closely related organisms had tiny differences in their genomes. (pnnl.gov)
Taking inventory and monitoring of representative groups of related organisms (i.e., taxa) will provide us with information on how well our wildlife sanctuaries represent the biological diversity found in Massachusetts and will provide information on changes over time. (massaudubon.org)