(1) In ducks and ratite birds, lymph heart myocytes more slowly but progressively differentiate a cytomorphology that does not conform in all characteristics to cardiac or skeletal muscle and even resembles in some aspects, smooth muscle.
(2) Although the phylogeny of Ratites is disputed, in particular their possible common origin with Carinates, which include most of the living birds, species of the first sub-class seem to have the same neurohypophysial hormones as those of the second.
(3) We have enzymatically amplified and sequenced approximately 400 base pairs of the mitochondrial 12S rRNA gene from bones and soft tissue remains of four species of moas as well as eight other species of ratite birds and a tinamou.
(4) Two groups of flightless ratite birds existed in New Zealand during the Pleistocene: the kiwis and the moas.
(5) These data support the theory that the ancestors of penguins were flying oceanic birds and that flightlessness in penguins has evolved independently from flightlessness in ratites.
(6) In juvenile ducks and ratites some myocytes differentiate to conductile cells, much as the conductile myocytes and myofibers of the blood heart.
(7) Osteocalcin (the 6,000 dalton Mr gamma-carboxyglutamate-containing protein of bone) has been detected in acid extracts of bones of the extinct class of New Zealand ratite birds, the moas, using a radioimmunoassay for sheep osteocalcin.
(8) This is similar to the pattern shown by ratite birds, where the decline period may be variable and facilitates hatching synchrony.
(9) Ultrastructural investigations of avian cardiac muscle, including ratite hearts, have provided great insights into the mechanisms as to how excitation leads to contraction in the heart.
(10) Alignment of the N-terminal sequence of osteocalcin from the extinct moa against the osteocalcins of the extant ostrich, rhea and emu reveals the homology amongst the ratite species is greater than the homology with the chicken osteocalcin.
(11) Ratites or paleognathid birds may have a different brain-to-metabolism association.
(12) To explain the current geographic distribution of ratites and the magnitude of the transferrin distances, it is supposed that the ancestors of these flightless birds walked across land bridges between the southern continents during Cretaceous times.
(13) These predictions seem to hold well for published data on the development of eggs of fish and ratite, precocial and altricial birds.
(14) Metallic proventricular foreign bodies are a potential source of heavy metal poisoning in ratites.
(15) A biochemical approach was used to study the evolution of ratite birds, i.e., the ostriches, rheas, cassowaries, emus, and kiwis.
(16) Quantitative immunological comparison of transferrin from ratites, tinamous, and other flying birds indicates that all the ratites and tinamous are allied phylogenetically and that they are of monophyletic origin relative to other birds.
(17) Osteocalcin the major gamma carboxyglutamic acid containing protein of vertebrate bone has been purified from the bones of a specimen of Pachyornis elephantopus, a species of the extinct class of New Zealand ratite birds, the moas.
(18) The study of the ratite conduction fibers bears out the idea of an inverse relationship between the size of the gap junctions and the input resistance of cardiac cells.
(19) The geometry of the conduction fibers of ratite hearts confirms earlier observations on birds showing that the geometry of the conduction system and its component cells is adapted to hearts of different sizes and rates of contraction so as to maintain a differential in conduction velocities between the conduction system and the working fibers.
(20) Thus, New Zealand probably was colonized twice by ancestors of ratite birds.
Rhea
Definition:
(n.) The ramie or grass-cloth plant. See Grass-cloth plant, under Grass.
(n.) Any one of three species of large South American ostrichlike birds of the genera Rhea and Pterocnemia. Called also the American ostrich.
Example Sentences:
(1) Among those speaking at the Liverpool Momentum meeting on Tuesday night was Rhea Wolfson, the Momentum-backed candidate for a place on the Labour national executive committee, which helps govern the party.
(2) The mute swan (Cygnus olor), mallard duck (Anas platyrhynchos), common gallinule (Gallinula chloropus), common rhea (Rhea americana), and red-billed hornbill (Tockus erythrorhynchus) were the 5 species most frequently affected of the 1,032 deaths from 1973 through 1983.
(3) President Obama hit the nail on the head by urging us to focus on expanding jobs in our nation’s infrastructure,” said Rhea Suh, the president of the National Resources Defence Council.
(4) In the latter order Dromaius is distinctly different from the reduced Struthio and Rhea which are closely related to one another by the presence of a rod-like endonuclear perforatorium.
(5) I kept thinking there must be an entire population of women like me, struggling day after day.” The medical visits had slowed down and Rhea felt frustrated and dejected at her painstakingly slow recovery.
(6) An in vitro enzymatic assay that transfers [3H]Gal to terminal GlcNAc moieties labels alpha A and alpha B crystallins in lens homogenates from man, rhesus monkey, rat, cow, and rhea (an ostrich-like bird).
(7) Similar organisms were identified by Warthin-Starry staining in the cecum of a juvenile rhea from a fourth flock that histologically had mild lymphocytic typhlitis.
(8) Unsurprisingly, both Rhea and John can’t help but think about cancer recurrence and what they might do differently the next time around.
(9) On one side sat two people close to the Corbyn project: the veteran Labour leftie and Momentum founder Jon Lansman , and Rhea Wolfson , a Scottish Momentum activist recently elected to Labour’s national executive.
(10) By homologous comparison with pheasant HbD (Phasianus colchicus colchicus), the alpha D-chains of American rhea differ by 28 amino-acid exchanges, the alpha D-chains of ostrich by 23 residues.
(11) The work done during each step to lift and to reaccelerate (in the forward direction) and center of mass has been measured during locomotion in bipeds (rhea and turkey), quadrupeds (dogs, stump-tailed macaques, and ram), and hoppers (kangaroo and springhare).
(12) It’s a simple idea that will change the world: cut carbon pollution today so our kids won’t inherit climate chaos tomorrow,” said the Natural Resources Defense Council president, Rhea Suh.
(13) Rhea Suh, the president of the US-based Natural Resources Defense Council (NRDC), said: “India’s strong climate plan offers a comprehensive approach to curb the worst impacts of climate change.” Germana Canzi, an analyst at UK-based Energy and Climate Intelligence Unit, hailed India’s pledge as significant and said: “The path of that India will now take in its development is extremely important for the future of the climate, particularly as the country is set to surpass China to become the world’s most populous country by 2028, with 1.45 billion people.” Nitin Pandit, CEO of the World Resources Institute in India, said: “As one of the most vulnerable countries to climate change, India recognises the domestic benefits of confronting this issue.
(14) "Even up here there are living creatures: vicuñas, rheas and vizcachas.
(15) The amino-acid sequence of alpha D-chains from HbD of adult American rhea and ostrich has been determined.
(16) New data on the cell kinetics of the cartilage growth plates in the chicken, budgerigar and rhea derived from studies with tritiated thymidine labelling are given.
(17) Rhea and her husband read extensively and asked many questions, suppressing the frequent misgiving that they were treading in the doctor’s territory.
(18) Intensive chemotherapy followed and with it, a series of severe complications including pneumonia, significant weight loss and, like Rhea, debilitating fatigue, which at its peak forced him to use two walking sticks to stand up.
(19) The ratio of amino-acid exchanges for beta:alpha A:alpha D for American rhea and ostrich is found to be 1:5.5:6.5.
(20) The landing-strip was fenced off to stop the horses, wild pigs and rheas eating the grass.