(n.) The state or quality of being metamorphic; the process by which the material of rock masses has been more or less recrystallized by heat, pressure, etc., as in the change of sedimentary limestone to marble.
Example Sentences:
(1) Quantitative and morphological data were obtained on developing olfactory axons in the African clawed frog, Xenopus laevis, during late premetamorphosis (stages 48-54), prometamorphosis (stages 55-57), and halfway through metamorphic climax (stages 58-62).
(2) (1) Control tadpoles did not undergo metamorphic change at any of the temperatures tested.
(3) There was a clear asynchrony in innervation, with projections to some terminal zones appearing before projections to others; projections to all terminal zones were present by late metamorphic stages.
(4) The general nerve terminal morphology and pattern of accumulation of acetylcholine receptors at cutaneous pectoris neuromuscular junctions were similar to those of the adult throughout metamorphic climax except that they still contained more than one motor axon.
(5) In contrast, tadpoles allowed to survive up to 6 months showed no loss of motoneurons if they did not enter metamorphic climax.
(6) The association becomes looser at the metamorphic stage and, occasionally, small breaks in the basement membrane are seen.
(7) Large adult animals have statoconia larger than those in early post-metamorphic animals which have just started producing multiple stones.
(8) The possible significance of decline in serum T4 levels to the metamorphic event in lamprey is discussed.
(9) The characteristics of the nuclear T3 receptors present in red blood cells (RBCs) of Rana catesbeiana tadpoles undergoing metamorphic climax have been investigated with a T3 saturation technique.
(10) The inhibition of unusually high endogenous corticosteroid levels in metamorphic larvae with metyrapone restores suppressor function.
(11) The retinotectal connexions of double nasal (NN), double temporal (TT) and double ventral (VV) eyes in juvenile Xenopus were mapped after post-metamorphic removal of the rostral, caudal, medial or lateral tectal halves with the subsequent cutting of the optic nerve of the operated eye.
(12) However, unlike the crossed fibers of the pre-metamorphic dermis, there is no preferred orientation to the fibers in either layer of the post-metamorphic dermis.
(13) Using selected cDNAs, RNA dot blot analysis of liver mRNA from tadpoles at different stages of metamorphosis showed that the level of one thyroid hormone-enhanced mRNA increased during late prometamorphosis and metamorphic climax.
(14) This also permitted the authors to note the absence of any myelofibrosis or metamorphic neo-osteogenesis.
(15) Coal dust of the IV stage of metamorphism was found to have more marked fibrogenic properties.
(16) The post-hatching development can be divided into four phases: planktonic, metamorphic, juvenile, and adult.
(17) They manifested themselves in disorders of the mitotic regimen and intercellular interactions, in atypical proliferations and primary glandular metamorphism of regenerating cells.
(18) Thyroids were taken from subjects representing metamorphic stages I (premetamorphic larvae), II (onset of climax), and VII (completion of gill resorption), as well as from captivity control larvae.
(19) (2) When tadpoles were kept in thyroxine solutions at 5 degrees, there were no changes in developmental morphology, and tadpoles kept at 18 and 20 degrees showed significant metamorphic changes in 5 to 6 days, but there was a high mortality at the higher T4 concentrations.
(20) The result is that four factors metamorphic rock, zinc, copper, chromium are suspected factors.
Pupa
Definition:
(n.) Any insect in that stage of its metamorphosis which usually immediately precedes the adult, or imago, stage.
(n.) A genus of air-breathing land snails having an elongated spiral shell.
Example Sentences:
(1) Histolysis and pyknosis begin in the prepupa and decrease considerably in the late pupa.
(2) Changes in haemolymph protein fractions and histology, of adipose tissue has been observed in the larvae, pupae and newly emerged adults of Danais chrysippus.
(3) The description of its larvae and some additional data on the taxonomy of males, females and pupae are given.
(4) In the case of glass, Gore-tex, and Dacron, which are insoluble in the solvent of the coating solution, only a superficial layer of PUPA could be obtained.
(5) Subsequently (35-hr pupa) the DLM commences to degenerate, forming random clumps of vacuolated muscle tissue.
(6) Specific immunohistochemical staining was detected in a variety of tissue types: the embryonic CNS; a few cell bodies in the central brain of pupae; these and other cells in the central brain of adults, as well as imaginal cells in the eyes, optic lobes, and the gut.
(7) With a silkworm pupa ovary mRNA, distinctly reverase results were obtained.
(8) Acidic glycolipids from pupae were also recognized, but only by the L2 antibody 334 and IgM M-protein.
(9) Thus, one may deduce that stopped larvae could have low levels of ecdysone, and perhaps these are the ultimate physiological cause of their arrested development before the critical larva-pupa molt.
(10) After mitoses have ended in the late pupa, the cells were arrested in G2.
(11) The facilitation of eclosion by adult colony members appears to be an obligatory process in the development of this species; pupae denied the aid of adult workers during eclosion are unable to remove the pupal cuticle and rapidly succumb.
(12) Fractionation of hemolymph from untreated pupae provided evidence for at least one preexisting factor which stimulated the killing of Escherichia coli.
(13) The device is particularly adaptable for the separation of large numbers of pupae without mechanical injury.
(14) The presence of glycosphingolipids in the pupae of the blowfly, Calliphora vicina, was established.
(15) 62, 1157 (1958] and to relaxation data reported in mycelia of Botrytis cinerea Persoon and pupae of the tobacco cutworm (M. Yoshida and K. Nose, Agric.
(16) The mean weight of the pupae produced by the membrane-fed flies was 24.9 mg.
(17) Heat shock induces a single large puff (hs puff) near the tip of chromosome arm EL in polytene foot pad cells of fly pupae (Sarcophaga bullata).
(18) Early stages of differentiation of the oocytes and nurse cells are comparatively studied in the polytrophic ovarioles in larvae, pupae and imago of the butterfly Laspeyresia pomonella and in the telotrophic ovarioles in larvae and imago of the bug Eurigaster integriceps.
(19) The levels of potassium, sodium, magnesium and calcium in leaves, midgut contents, midgut tissue, and blood were analysed in seven developmental stages between feeding, fourth-instar larvae and new pupae of the Cecropia silkworm.
(20) Starting from a crystal-negative parental strain of Bacillus thuringiensis, we isolated certain bacteriophage-resistant mutants which showed decreased virulence in pupae of the cecropia moth (Hyalophora cecropia).