Invertebrate biology is the study of animals that do not have a backbone, including insects, mollusks, worms, and other organisms. This area of research focuses on the anatomy, physiology, behavior, classification, and evolution of invertebrate species. Scientists in this field may investigate topics such as the diversity and distribution of invertebrate species, their ecological roles, and their interactions with other organisms. Invertebrates play crucial roles in ecosystems and are important for understanding biodiversity and the functioning of natural systems.