During allopatric ( from the ancient Greek allos, " other " + Greek patrā, " fatherland ") speciation, a population splits into two geographically isolated populations ( for example, by habitat fragmentation due to geographical change such as mountain building ).

During Wrocław's early history, its control changed hands between Bohemia ( until 992, then 1038 – 1054 ), the Kingdom of Poland ( 992 – 1038 and 1054 – 1202 ), and, after the fragmentation of the Kingdom of Poland, the Piast-ruled duchy of Silesia.

During these eruptions fragmentation occurs when magma comes into contact with bodies of water ( such as the sea, lakes and marshes ) groundwater, snow or ice.

During the fragmentation of Poland, it was the site of the Duchy of Sieradz.

During the struggle the gun fired into the ceiling and Tom Corrigan was struck in the leg by a piece of fragmentation.

During the cleavage stage, embryo evaluation is performed daily on the basis of the number, size, cell-shape and fragmentation rate of the blastomeres.

During the entire ordeal, U. S. and indigenous CIDG forces trapped inside the command bunker had to endure North Vietnamese harassment, which came in the form of fragmentation and tear gas grenades.

During the battle, he helped in the fire control efforts aboard the South Dakota, but suffered fragmentation wounds in the process.

During the later fragmentation of the Abbasid rule and the rise of their Shiite rivals the Fatimids and Buyids, a resurgent Byzantium recaptured Crete and Cilicia in 961, Cyprus in 965, and pushed into the Levant by 975.

During the 11th and 12th centuries the Polish state was ' in fragmentation ' amongst the competing Royal Dukes causing instability.

During the times of fragmentation of Poland, each Polish prince had his own chancellor, but with the reunification of Poland, the office of Chancellor of Kraków ( contemporary capital of the Kingdom of Poland ) became dominant and other, local chancellors disappeared by the early 15th century.

During this precarious period of development the mother should continue to influence the growth of the child's conscience.

During the period from 1 July 1960 through 31 January 1961, additional research affiliations were effected with the U. S. Army Medical Research and Development Command to conduct research in procedures for quantitative electron microscopy, and for the study of biophysical and biological studies of the structure and function of ocular tissue.

During this period, a total of 762 exhibits were presented at 442 medical and scientific meetings.

During the period of this report, 37,470 new cases were entered into the various registries.

During this period, 7,827 teaching sets were distributed on loan.

During the period of this report, 63 panel exhibits depicting the latest developments in medical research were displayed.

During the period, the laboratory rendered centralized macropathological service to qualified requesters.

During the period from 1 July 1960 through 31 January 1961, the Medical Museum was required to move to Temporary Building `` S '' on the Mall from Chase Hall.

During the period of about 4 hours around sunset, skywave transmission conditions are building up until full nighttime conditions prevail ; ;

During the Civil War period Mr. Brown also invented the Brown & Sharpe formed tooth gear cutter, a basic invention which ultimately revolutionized the world's gear manufacturing industry by changing its basic economics.

During this period 7,484,268 members were received, yet the net membership now is only 9,910,741.

During the period of the Iberian Union ( 1580 – 1640 ), Portugal lost influence and power and made new enemies.

During the Romantic period, art came to be seen as " a special faculty of the human mind to be classified with religion and science ".< ref >

During the same period the Georgian states of Colchis and Tabal arose around the Black Sea and central Anatolia respectively.

During this same period, slave-holding border states had more free African-Americans and European immigrants than the lower South, which increased Southern fears that slavery was threatened with rapid extinction in this area.

During this period he published 18 plays and 3 novels, including the murder mystery The Red House Mystery ( 1922 ).

During this period winter sports were slowly introduced: in 1882 the first figure skating championship was held in St. Moritz, and downhill skiing became a trendy sport with English visitors early in the 20th century, as the first ski-lift was installed in 1908 above Grindelwald.

During the post-World War I period ski-lifts were built in Swiss and Austrian towns to accommodate winter visitors, but summer tourism continued to be important ; by the mid-20th century the popularity of downhill skiing increased greatly as it became more accessible and in the 1970s several new villages were built in France devoted almost exclusively to skiing, such a Les Menuires.

During the first 11 months of 2006, net imports grew by 21 percent to $ 1. 95 billion, while exports stood at $ 895 million, up 0. 3 percent from the same period in 2005.

During the first 11 months of 2006, the European Union remained Armenia's largest trading partner, accounting for 34. 4 percent of its $ 2. 85 billion commercial exchange during the 11-month period.

During January – February 2007, Armenia ’ s trade with Russia and other former Soviet republics was $ 205. 6 million ( double the amount from the same period the previous year ), making them the country ’ s number one trading partner.

During this period, spectator attendances dropped and media condemnation increased, but Simpson and Lawry flatly disregarded the public dissatisfaction.

During the Tokugawa period ( 1600 – 1868 ) the Ainu became increasingly involved in trade with Japanese who controlled the southern portion of the island that is now called Hokkaido.

During this period Agamemnon and his brother, Menelaus, took refuge with Tyndareus, King of Sparta.

During the Akkadian period, the Akkadian language became the lingua franca of the Middle East, and was officially used for administration, although the Sumerian language remained as a spoken and literary language.

During a sojourn of slightly more than three months Chamberlain Littlepage could see action on both elements.

During the war, we set up schools for the teaching of psychological warfare, which included the teaching of propaganda, both black and white and the various shades of grey in between.

The details of the setting of `` Neutral Tones '' are not, strictly speaking, metaphorical, but they combine to create a mood which is appropriate both to a dismal winter day and to the end of love, and in this way love and weather, the emotions and the elements, symbolize each other in a way that is common to many of Hardy's best poems ( `` Weathers '', `` The Darkling Thrush '', and `` During Wind and Rain '', for example ) and to some moving passages in the novels as well ( Far From The Madding Crowd is full of scenes constructed in this way ).

During the election campaign, both candidates, Davis and Bush, reportedly received anonymous telephone calls.

During the Triassic Period (), the reptiles began to out-compete the amphibians, leading to a reduction in both the amphibians ' size and their importance in the biosphere.

During his short reign, peace was established both at home and abroad, finances were well regulated, and the various administrative services were placed on a basis that afterwards enabled Spain to pass through the disastrous war with the United States without the threat of a revolution.

During the First World War, because of his family connections with both sides and the division of popular opinion, Spain remained neutral.

During this period he also completed two woodcut series, the Great Passion and the Life of the Virgin, both published in 1511 together with a second edition of the Apocalypse series.

During his time in the former Soviet Union he founded the Jewish University, both in Moscow and Saint Petersburg.

During this period he instituted a regime of continuous training and insisted on high levels of physical fitness for both officers and other ranks.

During the Summer, the hour long programme News 24 Sunday was broadcast both on BBC One and the BBC News Channel at 09: 00, to replace The Andrew Marr Show, which is off air.

During the Battle of France in 1940, De Gaulle's 4th Armoured Division and elements of the British Expeditionary Force's 1st Army Tank Brigade both made probing attacks on the German flank, actually pushing into the rear of the advancing armoured columns at times.

During 32 BC, a third of the Senate and both consuls allied with Antony.

During the Cold War period both the United States and the Soviet Union experimented further with the concept, deploying early cruise missiles from land, submarines and aircraft.

During the time following the Concordat of Worms, the Church gained in both stature and power.

During the first years in power, under Lenin's rule, the Central Committee was the key decision-making body in both practice and theory, and decisions were made through majority votes.

During the heated debates in the Central Committee about a possible peace with the Germans, Lenin did not have a majority ; both Trotsky and Nikolai Bukharin had more support for their own position than Lenin.

During the period c. 500-450 BC, the tin deposits seem to have become more important, and fortified settlements appear such as at Chun Castle and Kenidjack Castle, to protect both the tin smelters and mines.

During this period, many performers, including Rose Maddox, Kitty Wells, Olivia Newton-John, Emmylou Harris, and Linda Ronstadt, covered her songs, and her siblings Randy and Stella both received recording contracts of their own.

During the period that has elapsed since seizures which triggered the tuna import ban, successive Ecuadorian governments have declared their willingness to explore possible solutions to this problem with mutual respect for longstanding positions and principles of both sides.

During his campaigns, El Cid often ordered that books by classic Roman and Greek authors on military themes be read aloud to him and his troops, for both entertainment and inspiration before battle.

During his service in both world wars, Armstrong gave the U. S. military free use of his patents.

During the late Middle Ages, Flanders ' trading towns ( notably Ghent, Bruges and Ypres ) made it one of the richest and most urbanized parts of Europe, weaving the wool of neighbouring lands into cloth for both domestic use and export.

During the 1950s and 60s, Afghanistan was able to use the Russian and American need for allies during the Cold War as a way to receive economic assistance from both countries.

During the civil war, the White Army and the Red Guards both perpetrated acts of terror, called the Red terror and White terror.