The seminal work that defined and provided a structure for the concept of cultural. competence was a monograph published in 1989 by the Georgetown University Child. Development Center through a contract with the Department of Health and Human. Services as part of the Child Adolescent Service System Program (CASSP).
Insects also probably have the largest biomass of the terrestrial animals. At any time, it is estimated that there are some 10 quintillion (thatâs 10,000,000,000,000,000,000 for those who like actual numbers) individual insects alive. In the United States, the number of described species is approximately 91,000.
It is estimated that around 9 or 10 million species of animals inhabit the earth; the exact number is not known and all estimates are rough. Animals range in size from no more than a few cells to organisms weighing many tons, such as the giant squid. By far most species of animals are insects, with groups such as mollusks, crustaceans, and nematodes also being especially diverse. By this measure our own group, the vertebrates, is relatively inconsequential from a diversity perspective. All animals are members of the Kingdom Animalia, also called Metazoa.