saltatory variations

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• Saltatory — Sal ta*to ry, a. [L. saltatorius. See {Saltant}, and cf. {Saltire}.] Leaping or dancing; having the power of, or used in, leaping or dancing. [1913 Webster] {Saltatory evolution} (Biol.), a theory of evolution which holds that the transmutation… …   The Collaborative International Dictionary of English

• Saltatory evolution — Saltatory Sal ta*to ry, a. [L. saltatorius. See {Saltant}, and cf. {Saltire}.] Leaping or dancing; having the power of, or used in, leaping or dancing. [1913 Webster] {Saltatory evolution} (Biol.), a theory of evolution which holds that the… …   The Collaborative International Dictionary of English

• Saltatory spasm — Saltatory Sal ta*to ry, a. [L. saltatorius. See {Saltant}, and cf. {Saltire}.] Leaping or dancing; having the power of, or used in, leaping or dancing. [1913 Webster] {Saltatory evolution} (Biol.), a theory of evolution which holds that the… …   The Collaborative International Dictionary of English

• Evolution —     Evolution (History and Scientific Foundation)     † Catholic Encyclopedia ► Evolution (History and Scientific Foundation)     The world of organisms comprises a great system of individual forms generally classified according to structural… …   Catholic encyclopedia

• Action potential — In physiology, an action potential is a short lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory. Action potentials occur in several types of animal cells, called… …   Wikipedia

• History of zoology (1859–1912) — This article considers the history of zoology in the years up to 1912, since the theory of evolution by natural selection proposed by Charles Darwin in 1859.Charles Darwin gave new direction to morphology and physiology, by uniting them in a… …   Wikipedia

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• Disease — Illness or sickness often characterized by typical patient problems (symptoms) and physical findings (signs). Disruption sequence: The events that occur when a fetus that is developing normally is subjected to a destructive agent such as the… …   Medical dictionary

• Interspersed repeat — Interspersed repetitive DNA is found in all eukaryotic genomes. These sequences propagate themselves by RNA mediated transposition and they have been called retroposons. Interspersed repetitive DNA elements allow new genes to evolve. They do this …   Wikipedia

• Flight feather — Flight feathers are the long, stiff, asymmetrically shaped, but symmetrically paired feathers on the wings or tail of a bird; those on the wings are called remiges (singular remex) while those on the tail are called rectrices (singular rectrix).… …   Wikipedia

• nature, philosophy of — Introduction       the discipline that investigates substantive issues regarding the actual features of nature as a reality. The discussion here is divided into two parts: the philosophy of physics and the philosophy of biology.       In this… …   Universalium