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www.reference.com/science/definition-kingdom-biology-b93fa9595fabb846

A "kingdom" in biology is a classification of living things. Organisms belong to one of six kingdoms of life. The current kingdoms are the Archaebacteria, Eubacteria, protists, fungi, plants and animals.

www.reference.com/science/four-kingdoms-domain-eukarya-b6deab65aa052736

The kingdoms in the domain Eukarya are Protista, Fungi, Plantae and Animalia. Eukaryota consists of organisms that have a true nucleus and structures called organelles that are surrounded by membranes.

www.reference.com/article/domain-name-1096486d3eedc1d9

A domain name is a unique address on the Internet that identifies computers and networks. It works as a part of the Domain Name System through which a user can assign an alphanumerical designation to an IP address, making it easier to remember and use.

www.reference.com/article/domain-controller-b93e9fc42cbc7318

A domain controller is a server within Microsoft Windows or Windows NT that responds to security authentication requests including log in and checking rights such as accessing a file folder and file modification. It manages all the security requests from other machines ...

www.reference.com/world-view/domain-structure-d0d1228b7dec946c

According to United Domains, domain structure consists of information to the left of the period and the letter combination to the right of it in a Web address. The content to the right of the punctuation is the domain extension, while the content on the left of the punc...

www.reference.com/article/cell-biology-cc8e4eb1c9d5c2b9

Cell biology is the study of cell structure and function, based on the concept that the cell is the basic unit of life. Understanding cells permits a detailed understanding of the tissues and organisms that cells make up.

www.reference.com/article/domain-function-ac59a251220abca0

The domain of a function is all of the x values of the function without any repetition. A vertical line has only one x value as its domain, while a horizontal line has a domain of all x values.