Which two areas of biology assist in grouping organisms into categories?

The correct answer is taxonomy and systematics. Taxonomy is the branch of biology that deals with the classification, naming, and grouping of organisms based on shared characteristics. It provides a framework to identify and organize the vast diversity of life forms in a structured manner. Systematics, on the other hand, is closely related and focuses on the evolutionary relationships among organisms, helping to understand how they are related through common ancestry.

Together, these two fields serve to establish categories that reflect both the similarities and differences among organisms. They often utilize data from various sources, including morphology, genetics, and evolutionary history, to create a more comprehensive understanding of the natural world.

Other fields listed, such as ecology, genetics, anatomy, behavior, and physiology, have their own valuable contributions to biology, but they do not primarily focus on classifying and categorizing organisms in the way that taxonomy and systematics do.