Several factors are currently slowing the rate of global expansion of wheat production: population growth rates are falling while wheat yields continue to rise, and the better economic profitability of other crops such as soybeans and maize, linked with investment in modern genetic technologies, has promoted shifts to other crops.

Several studies using cultured cells and laboratory rodents suggest the possibility of leukemogenic, genetic, reproductive, and neurological effects from chronic exposure.

Several studies of Random Amplified Polymorphic DNA ( RAPD ) and other types of genetic markers have been conducted on drug and fiber strains of Cannabis, primarily for plant breeding and forensic purposes.

Several methods have been proposed to remedy this by increasing genetic diversity somehow and preventing early convergence, either by increasing the probability of mutation when the solution quality drops ( called triggered hypermutation ), or by occasionally introducing entirely new, randomly generated elements into the gene pool ( called random immigrants ).

Several mechanisms are thought to be operative in the pathogenesis of autoimmune diseases, against a backdrop of genetic predisposition and environmental modulation.

Several cat registries do not recognize the Munchkin: Fédération Internationale Féline, which refuses to recognise what they consider a breed based on a " genetic disease ", achondroplasia.

Several genetic associations have been identified.

Several academic bodies exist to support behavior genetic research, including the Behavior Genetics Association, the International Society for Twin Studies, and the International Behavioural and Neural Genetics Society.

Several genetic links to shyness are current areas of research.

Several sources suggest that keratoconus likely arises from a number of different factors: genetic, environmental or cellular, any of which may form the trigger for the onset of the disease.

Several hundred genetic tests are currently in use, and more are being developed.

Several human genetic disorders are associated with mutations in gap junction genes.

Several genetic studies have found that eastern freshwater cod, in the southern-most of these four rivers, and Mary River cod, in the northern-most of these four rivers, are more closely related to each other than to Murray cod ( Jerry et al., 2001 ; Bearlin & Tikel, 2002 ; Nock et al., 2010 ).

Several reports have been published since the 1990s on the genetic makeup of the Siberian tiger and its relationship to other subspecies.

Several genetic polymorphisms have been found to be associated with a higher incidence of undesirable side-effects of atorvastatin.

Several acquired ( not inherited ) genetic mutations have been found in gliomas.

Several metabolites of nitrofurans, such as furazolidone, furaltadone and nitrofurazone cause cancer or genetic damage in rats.

Several hypotheses for this association have been advanced, including common genetic factors and dopamine, glutamate or serotonin abnormalities.

Several academic bodies exist to support behaviour genetic research, including the International Behavioural and Neural Genetics Society, Behavior Genetics Association, the International Society for Psychiatric Genetics, and the International Society for Twin Studies.

Several risk factors have been proposed, including autoimmune diseases, infections and genetic predisposition.

Several commentators praised its satirical elements with regard to genetic engineering.

Several theories of drug addiction exist, some of the main ones being genetic predisposition, the self-medication theory, and factors involved with social / economic development.

Several genetic factors determine susceptibility to male pattern baldness ( MPB ).

Several pathological processes involve the dentate nucleus including metabolic, genetic, and neurodegenerative disorders, as well as some infections.

Several potential methods of altering the climate of Mars may fall within humanity's technological capabilities, but at present the economic resources required to do so are far beyond that which any government or society is willing to allocate to the purpose.

Several other islands were captured and fortified to prevent Spanish attacks in the ongoing Dutch war for independence from Spain and to exploit timber and salt resources:

Several plans and proper management programmes can be introduced so that these resources remain untouched.

Several goals of the town at present are: to strengthen the local economy through developing and reusing industrial areas as well as retaining existing businesses ; and, to keep Northbridge as a desirable place to live through preserving and revitalizing the village centers, maintaining and expanding town services, and protecting natural resources.

Several of the most densely populated territories in the world are city-states, microstates, or dependencies .< ref > The Monaco government uses a smaller surface area figure resulting in a population density of 18, 078 per km < sup > 2 </ sup ></ ref > These territories share a relatively small area and a high urbanization level, with an economically specialized city population drawing also on rural resources outside the area, illustrating the difference between high population density and overpopulation.

Several industries prospered due to the rich mineral resources of the Hocking Valley.

Several cherished historic resources include the various Works Progress Administration ( WPA ) projects located within the city.

Several times in his writings he criticized townspeople and nobles who used their resources in unproductive ways to be carried round in chairs, to serve in houses and waste money on luxury.

Several of the city's recreational resources disappeared amid the economic hardships that began in the late 1970s.

Several ruinous civil wars in the late 1600s had squandered the country's human and other resources ; the 1690s also saw several years of wide-scale crop failure, which brought famine.

Several papers on visual resources, including: " Access to Diverse Collections in University Settings: the Berkeley Dilemma ", by Howard Besser and Maryly Snow, and " Visual Depictions and the Use of MARC: A View from the Trenches of Slide Librarianship ", by Maryly Snow

Several publications were created based on the fabricated samples, leading to incorrect grammatical analysis and dictionary resources that acted as a barrier to future researchers.

Several factors affect an animal ’ s ability to forage and acquire highly profitable resources.

Several food resources exist, and are necessary to feed miners, who dig for four materials: coal ( for smelting ore ), iron ore, gold ore and stones ( for buildings ).

Several contemporary writers agree in testifying to Colepeper's great debating powers and to his resources as an adviser, but complain of his want of stability and of his uncertain temper.

Several water resources development projects have been built in the Manipur River basin to meet growing demands for irrigation.

Several military historians have been critical of the need for the operation, with one historian, Barry Gregory, arguing that " Operation ' Varsity ' was not entirely necessary ..." Another historian, James A. Huston, argues that "... had the same resources been employed on the ground, it is conceivable that the advance to the east might have been even more rapid than it was ".

Several later companies were largely made up of people with fewer resources, who pulled or pushed handcarts ( similar to wheelbarrows ) holding all of their provisions and personal belongings.

Several additional years of travels on the European continent, to England, and in Sweden, gained him experience, knowledge of natural resources and important contacts.

Several wartime vessels had belt armour that was thinner or shallower than was desirable, to speed production and conserve resources.

Several factors, such as difficulty, ministerial appointments, technologies, and resources available can modify this number, producing the actual IC.

Several advantages can be foreseen, as cost reductions, resources complementarity and technological transfer.

Several Gotham City crime bosses pool their resources to deal with a vigilante called the Reaper, and Chill is hired to take him out.

Several Scottish and Irish stonemasons had immigrated to Nova Scotia to work on the project but were left stranded in the colony with little resources after the project had halted.