key couplet

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• key — 1) a tabulation of characters used to identify a species. Two rubrics form a couplet, the usual arrangement of keys. Each couplet gives an alternative set of characters leading to the species identity or to the next couplet. Also called… …   Dictionary of ichthyology

• Single-access key — A key in Biology is a modeling method used for categorizing species using logical choices. A single access key (Dichotomous key also called sequential key , analytical key [1], or pathway key ) is a key where the sequence and structure of… …   Wikipedia

• identification key — a tabulation of characters used to identify a species. Two rubrics form a couplet, the usual arrangement of keys. Each couplet gives an alternative set of characters leading to the species identity or to the next couplet. Artificial key, q.v.,… …   Dictionary of ichthyology

• Reticulation (single-access key) — In biology, a reticulation of a single access identification key connects different branches of the identification tree to improve error tolerance and identification success [Osborne, D. V. 1963. Some Aspects of the theory of dichotomous keys.… …   Wikipedia

• yoked key — indented key (a dichotomous key in which the first part of a couplet is followed by all subsequent couplets. Each subordinate couplet is indented to the right for reasons of clarity; not much used in ichthyology) …   Dictionary of ichthyology

• indented key — a dichotomous key in which the first part of a couplet is followed by all subsequent couplets. Each subordinate couplet is indented to the right for reasons of clarity; not much used in ichthyology …   Dictionary of ichthyology

• bracketed key — a dichotomous key in which contrasting parts of a couplet are numbered and presented together, without intervening couplets (the brackets are omitted). Used in some fish keys …   Dictionary of ichthyology

• dichotomous key — an identification key using a series of alternative choices, each pair forming a couplet, that eventually lead to a species identity; the usual form of keys for fish identification …   Dictionary of ichthyology

• monothetic key — a dichotomous key in which each couplet has single contrasting statements requiring simple either/or answers …   Dictionary of ichthyology

• English literature — Introduction       the body of written works produced in the English language by inhabitants of the British Isles (including Ireland) from the 7th century to the present day. The major literatures written in English outside the British Isles are… …   Universalium

• Poetry — This article is about the art form. For other uses, see Poetry (disambiguation). Literature Major forms Novel · Poem · Drama Short story · Novella …   Wikipedia