(n.) A tadpole; -- called also purwiggy and porwigle.
Example Sentences:
Tadpole
Definition:
(n.) The young aquatic larva of any amphibian. In this stage it breathes by means of external or internal gills, is at first destitute of legs, and has a finlike tail. Called also polliwig, polliwog, porwiggle, or purwiggy.
(n.) The hooded merganser.
Example Sentences:
(1) Plakoglobin is present in the fertilized egg, increases in abundance by neurula stage, then declines at the tailbud and tadpole stages.
(2) These antibodies were used to study the localization and synthesis of myosin heavy chain and tropomyosin in the limb buds of premetamorphic (stage VI-VII) tadpoles treated with triiodothyronine (T3) to induce metamorphosis.
(3) For the study of the hypothalamo-hypophysial system of Xenopus laevis tadpoles, hypothalamic lesions were made by means of the electrocoagulation technique.
(4) Because of the relatively high levels of endogenous TH in tadpoles during climax, the use of an in vivo saturation assay employing [125I]T3 was not feasible.
(5) Both cells are more numerous and stimulated in grouped Tadpoles than in isolated ones.
(6) Unlike the crossed retinotectal and retinothalamic projections, which begin to form during early embryonic stages, the ipsilateral projection does not begin to develop until late in tadpole life, at stages when thyroxine first becomes detectable in the circulation.
(7) The four hosts (Mollusc -- Crustacean -- Odonat -- Amphibian) are obligatory in the life cycle for it is impossible to infect the Insects directly with the cecariae or the frog (tadpoles as well as adults) with the mesocercariae.
(8) B is the predominant glucocorticoid in tadpole plasma before climax.
(9) Sodium pump, measured as K+-dependent, ouabain sensitive pNPPase, but not the non-specific, ouabain insensitive pNPPase, was stimulated by thyroxin in epidermis of tadpoles of Rana perezi.
(10) Schematic eyes, with homogeneous and non homogeneous lenses, were constructed for tadpoles, juvenile toads, and adult toads.
(11) The third major isoform, which was enriched in the mantle and branchial sac of adults and localized primarily in the tails of tadpoles, is a muscle actin.
(12) By histological criteria, these motoneurons appeared more differentiated than those in normal tadpoles.
(13) Some features are similar in adults and tadpoles, while others differ and explain the particularities observed previously at the protein level.
(14) The haemoglobin of such tadpoles has been extracted in buffer, converted to a cyanmet form, and run on polyacrylamide gels.
(15) The performance of tadpoles and juvenile frogs on a battery of behavioral tests was compared before and after tectotomy, removal of the telencephalon (decerebration), tectotomy in conjunction with decerebration, or before and after a sham operation.
(16) Here we report that, after incubation in oocytes, triploid erythrocyte nuclei from juvenile frogs of Rana pipiens directed the formation of feeding tadpoles that survived up to a month and had differentiated hind limb buds.
(17) However, Xenopus tadpoles lack nt innervation of the medial septum.
(18) Indirect immunofluorescent staining was used to detect and localize thyroxine (T4) in blood smears from individual Rana catesbeiana tadpoles in almost every stage of larval development.
(19) Tadpoles at stage 50 could regenerate toes and claws without defect, but in the later the regenerative capacity gradually declined by reducing the number of toes and claws and accompanied by malformation of skeleton as the stage proceeded.
(20) (1) Control tadpoles did not undergo metamorphic change at any of the temperatures tested.