FDA entomologists examine food samples, looking for possible contamination. Atlanta, Georgia, 2009. Entomology is the scientific study of insects, a branch of arthropodology, which in turn is a branch of biology. Entomology includes a cross-section of topics as diverse as molecular genetics, behavior, biomechanics, biochemistry, systematics, physiology, developmental biology, ecology, morphology, paleontology, mathematics, anthropology, robotics, agriculture, nutrition, forensic science, and more.