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Population genetics is a subfield of genetics that deals with genetic differences within and among populations, and is a part of evolutionary biology.Studies in this branch of biology examine such phenomena as adaptation, speciation, and population structure.
Source: Population Census 2010, [2] except for final column, taken from Population Census 2020. Note: (a) North Kalimantan province was created in 2012 (by separation from East Kalimantan province); the 2010 total figures given are those for the provinces as they were following that splitting (Urban % and Total Fertility Rate columns unadjusted).
The median age of the world's population is estimated to be 31 years in 2020, [9] and is expected to rise to 37.9 years by 2050. [73] According to the World Health Organization, the global average life expectancy is 73.3 years as of 2020, with women living an average of 75.9 years and men approximately 70.8 years. [74]
Cartogram of the world's population in 2018; each square represents 500,000 people. This is a list of countries and dependencies by population.It includes sovereign states, inhabited dependent territories and, in some cases, constituent countries of sovereign states, with inclusion within the list being primarily based on the ISO standard ISO 3166-1.
Censuses were taken in Malaysia in 1970, 1980, 1991, 2000, 2010, and 2020. [8] The total population is around 32.4 million according to the 2020 census. [9] The population distribution is highly uneven, with some 20 million residents concentrated in Peninsula Malaysia. [10] 74.7% of the population is urban. [11]
According to the 2022 revision of the World Population Prospects [2] [3], the total population was 11,891,000 in 2020, compared to only 2 309 000 in 1950. The proportion of children below the age of 15 in 2020 was 45.3%, 52.4% were between 15 and 65 years of age, while 2.4% of the population was 65 years or older. . [4] [5]
PNAS was established by the National Academy of Sciences (NAS) in 1914, [note 1] [8] [9]: 30 with its first issue published in 1915. The NAS itself was founded in 1863 as a private institution, but chartered by the United States Congress, with the goal to "investigate, examine, experiment and report upon any subject of science or art."
Map showing urban areas with at least one million inhabitants in 2020 In 1800, only 3% of the world's population lived in cities, a figure that rose to 47% by the end of the twentieth century. In 1950, there were 83 cities with populations exceeding one million; by 2007, this number had risen to 468, [ 18 ] with 153 of them located in Asia.