Zoology, a branch of biology that studies the members of the kingdom Animalia and animal life generally. It includes each the inquiry into individual animals and their constituent elements, even to the molecular level and additionally the inquiry into animal populations, entire faunas, and additionally the relationships of animals to every different, to plants, and to the nonconscious atmosphere. although this wide selection of studies ends up in some isolation of specialties among biological science, the abstract integration within the up to date study of living things that has occurred in recent years emphasizes the structural and useful unity of life instead of its diversity.