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Electricity is a property of the atomic structure of matter, and is manifested as attraction between 2 oppositely charged bodies or repulsion between 2 similarly charged bodies.

Genetic diseases result from chromosome abnormalities or mutant genes showing a specific pattern of inheritance. In addition, genetic factors are involved in susceptibility to some nongenetic DISEASES.

Biochemistry, encompasses the study of the chemical nature of living material and of the chemical transformations that occur within it.

Metric conversion was the process of making metric units — such as metre, kilogram and degree Celsius — the common units of measurement in Canada, leaving the British imperial system (with units such as yard, gallon and pound) behind. The process was fraught with political interference and public resistance, and took place incrementally between 1970 and the early 1980s. Despite the shift, many Canadians still express certain measurements in imperial units, such as height (feet and inches).

Medical ethics are concerned with moral questions raised by the practice of medicine and, more generally, by health care.

The alarmingly increasing frequency of allergies, affecting over 20% of the population in developed countries, has led to the establishment of a new branch of medicine, that of allergology, which is conceptually closely related to immunology.

The study of plant life is organized in 3 ways, which are also applicable to zoological material.

The Canadian agri-food industry has become an effective producer and processor of food and feed as the result of the work of innovative, hard-working farmers, good management of land resources, and the application of the technology derived from agricultural research.

Tommy Douglas — the father of socialized medicine in Canada and one of the country’s most beloved figures — once supported eugenic policies. In 1933, he received a Master of Arts in sociology from McMaster University for his thesis, “The Problems of the Subnormal Family.” In the thesis, Douglas recommended several eugenic policies, including the sterilization of “mental defectives and those incurably diseased.” His ideas were not unique, as two Canadian provinces (and 32 American states) passed sexual-sterilization legislation in the 1920s and 1930s. However, by the time Douglas became premier of Saskatchewan in 1944, he had abandoned his support for eugenic policies. When Douglas received two reports that recommended legalizing sexual sterilization in the province, he rejected the idea.

Instruments, Invented And ImprovedAmong 19th-century Canadian inventors were James P.

Microbiology is the science that studies micro-organisms and viruses.

Statistics is the science concerned with the collection and analysis of numerical information to answer questions wisely. The term also refers to the numerical information that has been collected. Statistics has many applications in Canada, from government censuses and surveys, to decision making in industry, to medical research and technological innovation.

Influenza, often referred to as the flu, is a common, contagious respiratory illness. There are four types of influenza viruses: A, B, C and D. While influenza A, B and C viruses can infect humans, influenza D is believed to primarily affect animals such as cattle and pigs. Influenza C is rare in comparison to influenza A and B, which are the main sources of the “seasonal flu,” or the viruses that circulate in Canada and other countries each winter. Influenza A is also the source of flu pandemics. Canada has experienced five influenza pandemics since the late 19th century, in 1890, 1918, 1957, 1968 and 2009. In Canada, influenza causes an estimated 12,200 hospitalizations and 3,500 deaths each year.

To some extent, the history of engineering is the history of humanity's progress in using tools and observations on the nature of matter to overcome physical limitations and to modify, harness and control the natural environment.

Military aviation began with the use of balloons for observation as early as 1794, during the French Revolution.

Numerous tragedies have unfolded on Canadian roads and highways, the deadliest being a bus crash that killed 44 people in Quebec in 1997. Despite the death toll in such headline-grabbing disasters, Canada’s motor vehicle fatality and injury rates are steadily declining, thanks to engineering improvements in vehicles, and the increasing promotion and awareness of safe driving practices.

Chemistry, the science concerned primarily with the structure and properties of matter and with the transformation of one form of matter into another. Now one of the most theoretically and methodologically sophisticated sciences, chemistry had its beginnings in medieval alchemy.

Genetics may be conveniently divided into 3 areas of study: transmission genetics, molecular genetics and population genetics.