Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 781glaciated mountain tops in an ice age.regeneration n. [L. regenerare, to regenerate] The replacementof a part or parts lost through mutilation or otherwise.regenerative budding (BRYO: Gymnolaemata) Budding insidea broken zooid.regenerative cells (ARTHRO: Insecta) Cells of the stomach(ventriculus) that may be singly, in pairs beneath the columnarcells or grouped into clusters (nidi) or arranged incrypt-like outpocketings; functioning in renewal of otherepithelial cells when destroyed by secretion or degenerationduring molting or pupation.regression n. [L. re, back; gradi, to step] 1. Regressive evolution.2. A statistical method of comparing paired observations.regressive character A character being reduced or lost in thecourse of phylogeny.regressive evolution The appearance of characters in a taxonthat are usually considered primitive.regressive molting (ARTHRO: Insecta) In Isoptera, reversalduring metamorphosis, when they are already in the processof developing into a particular caste, back to a less differentiatedstage.regularization (ANN) Anatomical adjustments involved in reducingthe asymmetry due to unilateral splitting ofmesoblastic somites.regular triact (PORIF) A megasclere spicule with three equalrays separated by angles of 120 degrees.regulator gene A gene that controls the action of other genesthrough curtailing the rate of synthesis of the products ofother distant genes.reinfection n. [L. re, again; inficere, to make] A second infectionby the same microorganism after recovery from orduring the course of a primary infection.relic n. [L. reliquia, remnant] A present nonfunctional structurethat was originally useful; an isolated remnant of a oncewidespread population.