Several fields of discrete mathematics, particularly theoretical computer science, graph theory, and combinatorics, are important in addressing the challenging bioinformatics problems associated with understanding the tree of life.

Several institutions, besides those already mentioned, played important parts.

Several billion kilograms of polyesters are produced industrially annually, important products being polyethylene terephthalate, acrylate esters, and cellulose acetate.

Several important cinematic movements, including the Nouvelle Vague, began in the country.

Several types are existent in Qing dynasty and used in dishes of stewing hams ( 火腿炖肘子 ), and vegetables, or for a wide variety of soup and important soup stocks.

His critically acclaimed book Lyrics on Several Occasions of 1959, an amalgam of autobiography and annotated anthology, is an important source for studying the art of the lyricist in the golden age of American popular song.

Several formerly important franchise courts were not officially abolished until Courts Act of 1971.

Several important buildings and structures were built during this time, including the Kansas City City Hall and the Jackson County Courthouse — both added new skyscrapers to the city's growing skyline.

Several industry groups also recognize light pollution as an important issue.

Several types of molecules are particularly important during morphogenesis.

Several of the more important ways observations can be affected by human psychology are given below.

Several other important engravers also made cards, including Master ES and Martin Schongauer.

Several economically important products come from Rosaceae, including many edible fruits ( such as apples, apricots, plums, cherries, peaches, pears, raspberries, and strawberries ), almonds, and ornamental trees and shrubs ( such as roses, meadowsweets, photinias, firethorns, rowans, and hawthorns ).

Several important political innovations of classical antiquity came from the Greek city-states and the Roman Republic.

Several Referendums supported the state being in control of the most important utilities and energy companies.

Several important modern cities, including Stockholm and Lviv, were founded in the 1250s.

Several important cultural achievements were made in the decade, including publication of Roger Bacon's important scientific work Opus Majus and Thomas Aquinas ' Summa contra Gentiles.

Several lakesthe most important of which are Lake Herăstrău, Lake Floreasca, Lake Tei, and Lake Colentinastretch across the northern parts of the city, along the Colentina River, a tributary of the Dâmbovița.

Several singular oak trees, such as the Royal Oak in Britain and the Charter Oak in the United States, are of great historical or cultural importance ; for a list of important oaks, see Individual oak trees.

Several important trade routes from India and China ( including the Silk Road ) passed through Bactria and, as early as the Bronze Age, this had allowed the accumulation of vast amounts of wealth by the mostly nomadic population.

Several of Gauthier's students are now important moral, political, and legal philosophers in the United States and Canada.

Several important features of visual perception can be traced to the retinal encoding and processing of light.

Several important diseases of the nervous system are associated with dysfunctions of the dopamine system.

Several American universities offer graduate certificate programs in institutional research, including Ball State University, Florida State University, Indiana University, University of Missouri, Penn State University, and San Diego State University.

Several changes were made in regard to the myth, most notably that Perseus did not marry Andromeda after he rescued her from the sea monster.

* Several changes were made to college rules in 2011, all of which differ from NFL practice:

Several changes have reduced the capacity of motels to serve this purpose.

Several attempts to revamp the series through cast changes and, later, expanding the focus from the motel to the surrounding community were unsuccessful.

Several changes were made within months, but in the end Marienhof was canceled in June 2011.

Several other significant changes took place due to the crisis: mankind discovered it could now tap into ultraplanar energies that were seen as magical forces, the stars were gone from the sky, dimensional nexi were uncovered and pacts with " demons " ( inhabitants of dimensions near in n-dimensional space to Tékumel's pocket dimension ) were made and a complex pantheon of " Gods " ( powerful extra-dimensional or multi-dimensional alien beings ) discovered.

Several of the changes were initiated by Kekkonen's successors.

Several changes and cuts decided on.

Several boundaries seen in the adult color pattern are marked by changes in the expression of particular transcription factors in the early pupa.

Several lines of evidence implicate changes in synaptic organization and connectivity.

Several environmental and dietary changes are thought to reduce the frequency or severity of symptom outbreaks.

Several biologists, including Sean B. Carroll of the University of Wisconsin – Madison suggest that " changes in the cis-regulatory systems of genes " are more significant than " changes in gene number or protein function ".

Several specific federal court rulings have set precedents regarding both court decreed name changes and common law name changes ( changing the name at will ).

Several changes to the rules and aesthetics of the game were made.

Several characters such as Hawkman, Donna Troy, and Power Girl saw their origins complicated by the changes implemented by the Crisis and the various reboots of characters.

Several changes to the league's rules were discussed, with two being adopted.

Several vague incarnations of evil in the Old Testament were given the translation draco in Jerome's Vulgate, to undergo changes in meaning and become broad embodiments of evil.

Several changes were made at the traditional opening of the new model year ( beginning August 1964 ), including the addition of back-up lights on some models, the introduction of alternators to replace generators, and an upgrade of the V8 engine from to displacement.

Several later versions of this deck, such as the Universal Waite deck, copy the Smith line drawings with minor changes and add more sophisticated coloring.

Several changes occurred at Clovis AFB in 1957.

Several more changes were made in 2011, the rule changes were announced after six animals died at the 2010 Stampede and were met with mixed reactions from both cowboys and animal welfare groups.