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The hierarchy of biological classification's eight major taxonomic ranks. A genus contains one or more species. Minor intermediate ranks are not shown. A species (pl.: species) is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction.
Order Family Scientific name English common name Chinese common name Mammalia Mammals 哺乳類 1 Chiroptera Chiroptera, all species of all genera and all families Bats 蝙蝠 2 Primates Primates, all species of all genera and all families except an
The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups").It is an icon of chemistry and is widely used in physics and other sciences. It is a depiction of the periodic law, which states that when the elements are arranged in order of their atomic numbers an approximate recurrence of ...
In zoological nomenclature, a type species ( species typica) is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen (or specimens). [1] A similar concept is used for suprageneric groups and called a type genus.
Aves (birds) See text for extinct groups. Reptiles, as commonly defined, are a group of tetrapods with an ectothermic ('cold-blooded') metabolism and amniotic development. Living reptiles comprise four orders: Testudines ( turtles ), Crocodilia ( crocodilians ), Squamata ( lizards and snakes ), and Rhynchocephalia (the tuatara ).
This article lists forms of government and political systems, which are not mutually exclusive, and often have much overlap.[1] According to Yale professor Juan José Linz there are three main types of political systems today: democracies, totalitarian regimes and, sitting between these two, authoritarian regimes with hybrid regimes.[2][3 ...
An octopus ( pl.: octopuses or octopodes [a]) is a soft-bodied, eight-limbed mollusc of the order Octopoda ( / ɒkˈtɒpədə /, ok-TOP-ə-də [3] ). The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids. Like other cephalopods, an octopus is bilaterally symmetric with two ...
