Final answer:
The basis of modern classification in biological classification is the Linnaean classification system, developed by Carolus Linnaeus. It groups organisms based on their obvious physical traits and consists of a hierarchy of taxa. Modern classification systems have also incorporated biochemical, genetic, and evolutionary information to better understand the relationships between organisms.
Step-by-step explanation:
The basis of modern classification in biological classification is derived from the Linnaean classification system. Developed by Swedish botanist Carolus Linnaeus in the 1700s, this system classified organisms based on their obvious physical traits such as number of legs or shape of leaves. It consists of a hierarchy of taxa, ranging from the kingdom to the species.
Since the development of the Linnaean system, scientists have made revisions to incorporate biochemical and genetic similarities and differences in addition to physical traits. This approach, known as phylogenetic classification, considers the evolutionary history of organisms and is represented by phylogenetic trees. By studying these similarities and differences, scientists can better understand the relationships and classifications of different organisms.