(n.) The act of unfolding or unrolling; hence, in the process of growth; development; as, the evolution of a flower from a bud, or an animal from the egg.
(n.) A series of things unrolled or unfolded.
(n.) The formation of an involute by unwrapping a thread from a curve as an evolute.
(n.) The extraction of roots; -- the reverse of involution.
(n.) A prescribed movement of a body of troops, or a vessel or fleet; any movement designed to effect a new arrangement or disposition; a maneuver.
(n.) A general name for the history of the steps by which any living organism has acquired the morphological and physiological characters which distinguish it; a gradual unfolding of successive phases of growth or development.
(n.) That theory of generation which supposes the germ to preexist in the parent, and its parts to be developed, but not actually formed, by the procreative act; -- opposed to epigenesis.
(n.) That series of changes under natural law which involves continuous progress from the homogeneous to the heterogeneous in structure, and from the single and simple to the diverse and manifold in quality or function. The pocess is by some limited to organic beings; by others it is applied to the inorganic and the psychical. It is also applied to explain the existence and growth of institutions, manners, language, civilization, and every product of human activity. The agencies and laws of the process are variously explained by different philosophrs.
Example Sentences:
(1) The process of sequence rearrangement appears to be a significant part of the evolution of the genome and may have a much greater effect on the evolution of the phenotype than sequence alteration by base substitution.
(2) It is argued that this process drove the evolution of present 5' and 3' splice sites from a subset of proto-splice sites and also drove the evolution of a more efficient splicing machinery.
(3) It has been possible to observe the evolution of their lesions.
(4) Gradual evolutionary change by natural selection operates so slowly within established species that it cannot account for the major features of evolution.
(5) The early absolute but transient dependence of these A-MuLV mast cell transformants on a fibroblast feeder suggests a multistep process in their evolution, in which the acquisition of autonomy from factors of mesenchymal cell origin may play an important role.
(6) The evolution and function of multiple forms of a given photosynthetic pigment in vivo are discussed.
(7) Evolution of serological procedures was continuous through this period but without clear evidence of improvement in performance of antibody detection although performance in the UK appears to be comparable with that elsewhere.
(8) With the successful culture of these tissues, their development, biochemistry, and physiology, potentially of great importance in understanding early vertebrate evolution, can be better understood.
(9) This situation highlights the potential importance of molecules with different inheritance patterns in elucidating complex cases of reticulate evolution.
(10) The evolution of tissue damage in compressive spinal cord injuries in rats was studied using an immunohistochemical technique and by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis.
(11) Republican presidential hopeful Scott Walker has refused to say whether he believes in the theory of evolution, arguing that it is “a question a politician shouldn’t be involved in one way or the other”.
(12) It is mentioned that the lack of a valuable status for industrial physicians may adversely affect the evolution of training programs in Switzerland.
(13) Assessment of a predictive factor for the evolution of the disease is not yet possible.
(14) These studies indicate that, in three models of acute liver injury, the net influx of calcium across the plasma membrane is increased early in the evolution of the injury before irreversible damage occurs.
(15) The strong homology of mammalian L27' to yeast L29 suggests a function which has been conserved throughout evolution, and thus L27' may also be involved in peptidyl transferase activity.
(16) The diversity of the non-Hodgkin's groups, the continued evolution of histopathologic classifications, and the great frequency of advanced disease in the lymphocytic subgroups make the Ann Arbor classification of only limited value for the non-Hodgkin's lymphomas.
(17) We show how this model would explain the perinatal or infantile onset of the disease, the variability of the rate of evolution between the different SMA forms, and the fact that motoneuron loss is much more dramatic in SMA than in even advanced cases of myopathy.
(18) Evolution into acute myeloid leukemia occurred in 11 patients.
(19) On evaluation of the time evolution of the symptoms we found that most patients continued to show them until September each year.
(20) The evolution with time of cardio-respiratory variables, blood pressure and body temperature has been studied on six males, resting in semi-nude conditions during short (30 min) cold stress exposure (0 degree C) and during passive recovery (60 min) at 20 degrees C. Passive cold exposure does not induce a change in HR but increases VO2, VCO2, Ve and core temperature Tre, whereas peripheral temperature is significantly lowered.
Oligocene
Definition:
(a.) Of, pertaining to, or designating, certain strata which occupy an intermediate position between the Eocene and Miocene periods.
(n.) The Oligocene period. See the Chart of Geology.
Example Sentences:
(1) These are much older than all other Fayum, Oligocene primates and are believed to be Eocene in age.
(2) Recently discovered cranial fossils from the Oligocene deposits of the Fayum depression in Egypt provide many details of the facial morphology of Aegyptopithecus zeuxis.
(3) New specimens of the early Oligocene anthropoidean, Oligopithecus savagei, from the Fayum, Egypt, include unworn specimens of lower teeth plus the first known upper molar, premolar, and incisor.
(4) The subterranean Spalacidae originated probably from a muroid-cricetoid stock in Asia Minor or vicinity, in Upper Oligocene times and adaptively radiated underground in the Balkans, steppic Russia and Middle East, extending into North Africa.
(5) Their origin was dated back to Oligocene (38 mln years ago).
(6) We interpret this finding to indicate that the ancestral gene of the DRw52 group of human DRB1 alleles separated from the rest of the HLA-DRB1 alleles before the separation of the Old World monkeys (Cercopithecoidea) from the apes (Hominoidea) in the early Oligocene.
(7) Discovery of this new species emphasizes the diversity of anthropoid primates that had already evolved by the early Oligocene.
(8) Researchers have access to the animals for noninvasive studies, to a large collection of preserved tissues and cadavers, and to an extensive collection of Eocene and Oligocene fossils.
(9) Major mass extinctions among tetrapods took place in the early Permian, late Permian, early Triassic, late Triassic, late Cretaceous, early Oligocene and late Miocene.
(10) Oligocene catarrhine molars have increased crushing-grinding capacities and maintained but modify their shearing.
(11) From the Oligocene through Pleistocene, seed-caching rodents are the most likely dispersal agents of ginkgo.
(12) The cranium of Oligocene anthropoideans thus provides no support for the hypothesized tarsier-anthropoidean clade.
(13) All of the apes from the early Miocene of East Africa seem to represent a single phyletic group that could be easily derived from the Oligocene apes known from the Fayum of Egypt.
(14) As a test of this hypothesis, isolated carpal and tarsal bones of primitive Oligocene hyracoids from the Fayum, Egypt, have been examined to determine whether these indicate a taxeopode or diplarthral carpus and tarsus.
(15) Dental similarities between Oligopithecus and early platyrrhines are probably primitive retentions that do not support the hypothesis of an Oligocene trans-Atlantic crossing by primates.
(16) Victoria-pithecus shares a suite of craniofacial features with the Oligocene catarrhine Aegyptopithecus and early Miocene hominoid Afropithecus.
(17) It is suggested that the route of migrations was across the Bering Land Bridge, and further, that the migrations occurred during the period from late Oligocene to middle Miocene, 20-25 million years ago.
(18) Radiographic analysis of mandibular fragments of the Oligocene primates Apidium phiomense and Parapithecus grangeri provides sequences of postincisor development and eruption.
(19) The morphology of early Oligocene primate foot bones suggests that at least three quite distinct groups, corresponding to three recognized superfamilies, were present in the early Oligocene of South America and Africa.
(20) The record of early fossil Simiiformes (Anthropoidea) from the Late Eocene and Early Oligocene of Africa and the Arabian Peninsula has increased dramatically in recent years.