Most sharks rely on ram ventilation, forcing water into the mouth and over the gills by rapidly swimming forward.

Most fossil sharks from about 300 to 150 million years ago can be assigned to one of two groups.

Most sharks have eight fins.

Most sharks need to constantly swim in order to breathe and cannot sleep very long without sinking ( if at all ).

Most sharks are " cold-blooded " or, more precisely, poikilothermic, meaning that their internal body temperature matches that of their ambient environment.

Most sharks are ovoviviparous, meaning that the eggs hatch in the oviduct within the mother's body and that the egg's yolk and fluids secreted by glands in the walls of the oviduct nourishes the embryos.

Most ovoviviparous sharks give birth in sheltered areas, including bays, river mouths and shallow reefs.

Most sharks, rays and skates ( Elasmobranchii ) have small brain-to-body ratios, but the ratio is relatively high in manta rays and the closely related Mobula rays.

Most grey reef sharks are less than 1. 9 m ( 6. 2 ft ) long.

Most observed displays by grey reef sharks have been in response to a diver ( or submersible ) approaching and following it from a few meters behind and above.

Most nurse sharks are ovoviviparous, meaning the eggs develop and hatch within the body of the female, where the hatchlings develop further until live birth occurs.

Most blacktip reef sharks are found over reef ledges and sandy flats, though they have also been known to enter brackish and freshwater environments.

Most blacktip reef sharks are no more than long, though rarely individuals may reach or possibly.

Most attacks involve sharks biting the legs or feet of waders, apparently mistaking them for their natural prey, and do not result in serious injury.

Most modern attacks involving mako sharks are considered to have been provoked due to harassment or the shark being caught on a fishing line.

Most larger Atlantic and Caribbean fish and sharks that should be able to eat the lionfish have not recognized them as prey, likely due to the novelty of the fish in the invaded areas.

Most avant-garde creators, true to their interest in the self-sufficiency of pure movement, have tended to dress their dancers in simple lines and solid colors ( often black ) and to give them a bare cyclorama for a setting.

On matters of race he was similarly inflexible: `` Most of the modern Latin races seem to have inherited the rigidity of the Roman mind ''.

) Most people would have to hire a contractor to build this shelter.

Most of Billy Haughton's 2-year-olds have worked from 2:40 to 2:35.

Most drill presses have a quill return spring that raises the spindle automatically when the feed lever is released and holds the quill in the raised position.

Most counties also have maps available from the county engineer showing roads and other features and from the assessor's office showing ownerships of land.

Most Europeans have been exercising newborn infants for centuries.

Most professors in the course must, naturally, again have a higher degree than the course offers.

Most others have been content to give only the most general attention to the broadest and most obvious features of the phonology when designing orthographies.

Most of this testimony may have been legally admissible as bearing on the corpus delicti of the total Nazi crime but seemed subject to question when not tied to the part in it of the defendant's Department of Jewish Affairs.

Most of our largest cities have one or more separate vocational or technical high schools.

Most adolescents have some ideological diffusion at various developmental stages, as they experience a proliferation of ideas and values.

Most of these former churches are now used as warehouses, but `` neither Anglicans nor Nonconformists object to selling churches to Roman Catholics '', and have done so.

Most of them have been assimilated, but sometimes a man in Miyagi or Akita prefectures is much more hairy than the average Japanese, and occasionally a girl will be strikingly lovely, her coloring warmed and improved by a little of the tawny honey-in-the-sun tint of the invaders from the South.

Most have four limbs and live in fresh water or on land but the caecilians, though included in the group, live in burrows in damp soil and are limbless.

Most amphibians lay their eggs in water and have aquatic larvae that undergo metamorphosis to become terrestrial adults.

Most alkali metals have many different applications.

Most such printed sources have been updated for intervals of only about every fifty years ( e. g., J1900, J1950, J2000 ).

* Most monocots are unable to thicken their stems once they have formed, since they lack the cylindrical meristem present in other angiosperm groups.

Most aquatic species have a totally submerged juvenile phase, and flowers are either floating or emergent.

Most of the physical properties of astatine have been estimated ( by interpolation or extrapolation ), using various theoretically-grounded or empirically-derived methods.

Most of them have mitred abbots.

Most do not enter the World to Come immediately, but now experience a period of review of their earthly actions and they are made aware of what they have done wrong.

Most Orthodox siddurim ( prayerbooks ) have a prayer asking for forgiveness for one's sins that one may have committed in this gilgul or a previous one.

Most meteoritic material, by the time it reaches the Earth's surface, has been reduced to dust or to spherules of ablated material in its passage through the atmosphere.

Most of the Junkers were above the blinding light of the flares, and the radar-controlled shore gun had been knocked out by one of the first sticks of bombs.

Most of the emphasis has been placed on a `` wild party '' at a seaside villa.

Most of what is said about his great men of history has already been said, and what has not is largely irrelevant to the contemporary scene.

" Most of the tunes had been previously published, but " Gallaher " and " St. Mary " had not.

Most of the remaining individuals in this sample have been classified definitively only as belonging to macro-haplogroup M.

Most Protestants deny the need for this type of continuity and the historical claims involved have been severely questioned ; Eric Jay comments that the account given of the emergence of the episcopate in chapter III of Lumen Gentium " is very sketchy, and many ambiguities in the early history of the Christian ministry are passed over " Their reasons are given in detail below.

Most Protestant denominations deny the need of maintaining episcopal continuity with the early Church, holding that the role of the apostles was that, having been chosen directly by Jesus as witnesses of his resurrection, they were to be the " special instruments of the Holy Spirit in founding and building up the Church ".

Most significantly has been the idea of Preventive conservation.

Most of these data have been recorded by Plutarch, Florus, Cicero, Dio ( Dion ) Cassius and Dionysius of Halicarnassus ( L. 2 ).

Most of the drugs in the second generation, known as atypical antipsychotics, have been developed more recently, although the first atypical antipsychotic, clozapine, was discovered in the 1950s and introduced clinically in the 1970s.

Most modern assassinations have been committed either during a public performance or during transport, both because of weaker security and security lapses, such as with U. S. President John F. Kennedy and former Pakistani Prime Minister Benazir Bhutto, or as part of coups d ' état where security is either overwhelmed or completely removed, such as with Patrice Lumumba and likely Salvador Allende.

Most have been repealed, have been declared unconstitutional, or are simply unenforced ; though prohibitions on the sale of alcoholic beverages or prohibitions of almost all commerce on Sundays are still enforced in many areas.

Most people are familiar with Helen Keller, who was both blind and deaf, but there has been considerable progress since the publication of her work.

Most of the other light aircraft acquired by the FABF in the 1970s and 1980s have also now been retired along with the Mi-4 helicopters, but some recent acquisitions have been made, including a Beechcraft King Air, a Piper PA-34 Seneca, a CEAPR Robin light training aircraft, and a single Air Tractor AT-802 aerial sprayer aircraft for spraying insecticides, purchased after the northern part of the country suffered heavy crop damage from a 2004 invasion of swarming locusts.

Fred Lynn and Ichiro Suzuki are the only two players who have been named Rookie of the Year and Most Valuable Player in the same year, and Fernando Valenzuela is the only player to have won Rookie of the Year and the Cy Young Award in the same year.

Most of the kinds commonly eaten fresh or dried, those of the genus Phaseolus, come originally from the Americas, being first seen by a European when Christopher Columbus, during his exploration, of what may have been the Bahamas, found them growing in fields.