(n.) Change of form, or structure; transformation.
(n.) A change in the form or function of a living organism, by a natural process of growth or development; as, the metamorphosis of the yolk into the embryo, of a tadpole into a frog, or of a bud into a blossom. Especially, that form of sexual reproduction in which an embryo undergoes a series of marked changes of external form, as the chrysalis stage, pupa stage, etc., in insects. In these intermediate stages sexual reproduction is usually impossible, but they ultimately pass into final and sexually developed forms, from the union of which organisms are produced which pass through the same cycle of changes. See Transformation.
(n.) The change of material of one kind into another through the agency of the living organism; metabolism.
Example Sentences:
(1) Birthdates of neurons were obtained from autoradiograms of animals receiving tritiated thymidine from gastrulation through 1 month after metamorphosis.
(2) It is that beautiful moment when the original Metamorphosis is destroyed so that it can be refashioned for a global community of readers in dire need of new forms of storytelling.
(3) During the first 15 to 20 min of metamorphosis the larval arms are retracted and resorbed into the aboral surface of the juvenile.
(4) 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.
(5) Not so in 2012, with the shortlist for outstanding achievement in dance revealed as Edward Watson for The Metamorphosis at Covent Garden; Sylvie Guillem for 6,000 Miles Away at Sadler's Wells and Tommy Franzen for Some Like it Hip Hop at the Peacock.
(6) Secondary echinococcosis generates by asexual regressive metamorphosis of larval element intro larval forms.
(7) About 2 weeks after metamorphosis, midwife toads Alytes obstetricans judge the size of a prey object mainly in scales of visual angle.
(8) The present investigation examines metamorphosis in the sternal ribs of American blacks (N = 53 males, N = 20 females), and tests the application of age estimation standards developed by the authors from a white population.
(9) Both experiments provided evidence that the shape of persistent leg motoneurons is stabilized and even regulated by cellular interactions during metamorphosis.
(10) Observations suggest changes induced by the cholesterol diet are comparable to cytologic alterations seen in spontaneous and drug induced hepatic tumors, as well as to more general "fatty metamorphosis" of the liver.
(11) Other workers have shown that prolactin blocks the rise in activity of several hydrolytic enzymes that occurs in regressing tissue during metamorphosis.
(12) The cup-shaped adhesive papillae of Distaplia occidentalis evert at the onset of metamorphosis and each transforms into a hyperboloidal configuration.
(13) Representative animals were reared through metamorphosis and their visuotectal projections were assayed using standard electrophysiology techniques.
(14) Exposure of embryos to 10(-8) M T3, which regulates amphibian metamorphosis, resulted in the premature induction of albumin mRNA, such that it is evident by stage 43.
(15) The study represents the first immunohistochemical demonstration of IR-TRH in larval anurans, and serves as a basis for clarification of the neuroendocrine regulation of metamorphosis.
(16) During insect metamorphosis many larval neurons persist but are modified to serve new behavioral roles at later stages of life.
(17) After the onset of metamorphosis the quality of life was better in splenectomized than in non-splenectomized patients.
(18) Sister Cristina's moment of metamorphosis from singing nun into global internet sensation involves four judges listening to her with their backs turned, as the Voice format demands, then spinning around when the cheering of the audience becomes hysterical and they've heard enough to know they want this mystery singer on their team.
(19) These results are interpreted to indicate that both treatment of explants with T4 and elevation of endogenous levels of thyroid hormones during spontaneous metamorphosis increased the relative rates of synthesis of several identical proteins.
(20) Staining of tyrosine hydroxylase-immunoreactive fibers in the median eminence and pituitary was sparse or absent in premetamorphic tadpoles, but became increasingly more intense as metamorphosis progressed.
Molting
Definition:
(p. pr. & vb. n.) of Moult
Example Sentences:
(1) In Experiment 1 (summer), hens regained body weight more rapidly, returned to production faster, and had larger egg weights (Weeks 1 to 4) when fed the 16 or 13% CP molt diets than when fed the 10% CP molt diet.
(2) After molting, resulting nymphs (n = 74) were fed on susceptible mice.
(3) The MT-2, derived from an adult T-cell leukaemia (ATL) cell, the Molt-4F, a human T-cell line, and the Isk, an EB virus-transformed B-cell line, were found to have high-affinity receptors for somatostatin, a cyclic tetradecapeptide that inhibits the release of substances such as growth hormone, TSH, glucagon, insulin, secretin, gastrin and cholecystokinin.
(4) The demonstration of cAMP-dependent protein kinase and of VIP- and PHI-mediated protein phosphorylation in Molt 4b lymphoblasts provides evidence on a molecular level for neuropeptide modulation of human lymphocyte function.
(5) The ability of various gangliosides to inhibit the cytotoxic activity of natural killers (NK-cells) from Syrian hamsters towards human lymphoma MOLT-4 cells was studied.
(6) Measurements were made at the imaginal molt and on fed and crowded imagos at 10, 20 and 30 post-imaginal days.
(7) A comparison between primary cells and resulting cell lines showed that the cell lines established from patients with T-ALL (MOLT 12, 13, 14 and MOLT 16, 17) expressed similar phenotypes and isoenzyme patterns, but were different in a few specific aspects.
(8) At the culmination of each molt, the larval tobacco hornworm exhibits a pre-ecdysis behavior prior to shedding its old cuticle at ecdysis.
(9) 2'-Deoxycytidine (10 microM) also blocked dGTP accumulation in MOLT-4 cells.
(10) Cytotoxicity resulting from dUMP misincorporation was consistent with the enhanced toxicity of piritrexim which was observed when HL-60 cells or MOLT-4 cells were exposed concurrently to exogenous deoxyuridine.
(11) Molting occurred in almost all kinds of organs examined.
(12) Syncytium formation between HUT-78 cells persistently infected with human immunodeficiency virus type 1 (HIV-1) and uninfected CD4-bearing MOLT-4 or CEM cells results in a rapid destruction of the MOLT-4 or CEM cells.
(13) Furthermore these cells exhibited cytotoxic activity against several tumour cell lines including the syngeneic L1210, the TNF-insensitive P815 mastocytoma, the human MOLT-4 lymphoblastic leukaemia, as well as the murine TNF-sensitive L929 fibroblast cell line.
(14) Second instar larvae which survive the molt exhibit a marked reduction in growth and eventually die as small second instar larvae.
(15) These lines of evidence were in accord with previous accounts of the so-called "molt inhibiting hormone" (MIH) effect.
(16) The objective of this study was to determine the molting process of Dirofilaria immitis third-stage larvae (L-3) to fourth-stage larvae (L-4), as it occurred in vitro.
(17) Injections of ovine prolactin during the pause-inducing procedure significantly reduced the subsequent rate of loss of primary wing feathers, suggesting that in certain physiological states, PRL may function to suppress molting.
(18) 1-beta-D-Arabinofuranosyl-E-5-(2-bromovinyl)uracil (BV-araU) and E-5-(2-bromovinyl)uracil, a metabolite of BV-araU, did not affect either the anti-human immunodeficiency virus activity or the cytotoxicity of azidothymidine in MT-4 and MOLT-4 cells.
(19) After the L1 molt, energy metabolism in animals destined to become dauer larvae diverges from that of animals committed to growth.
(20) 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.