Why has zoology become more closely connected with other branches of biology?

Zoology has increasingly integrated with other branches of biology as the life sciences have moved toward a unified understanding of life processes. This convergence is driven by several key factors:1

• Focus on General Biological Principles: Modern zoology has shifted from an exclusive emphasis on animals to a broader view that elucidates universal biological principles, such as the common basis of life, gene pool organization, and the interactions within ecosystems.1
• Molecular and Chemical Integration: The successful application of physical and chemical techniques to life processes has bridged the gap between zoology and other sciences. Researchers now utilize molecular studies, genetics, and physiology to analyze animal material, often prioritizing the solution of general biological problems over the study of a specific organism.12
• Technological Advancements: The adoption of advanced methods—such as electron microscopy, DNA sequencing, and bioinformatics—has allowed scientists to explore cellular and genetic levels of organization, necessitating collaboration across diverse scientific disciplines.34
• Conceptual Unity: The development of foundational theories, including cell theory, evolution, and homeostasis, has provided theoretical models that apply across microbes, plants, and animals, further unifying the biological sciences.2