function in. 1  chromosomal disorders (in chromosomal disorder) 2  crop production (in Poaceae: Economic and ecological importance) 3  fern evolution (in fern: Chromosome numbers and polyploidy) 4  speciation (in evolution: Polyploidy)
The American Medical Association (AMA), founded in 1847 and incorporated in 1897, is the largest association of physiciansâboth MDs and DOs âand medical students in the United States.
Association of Mature American Citizens. Association of Mature American Citizens (AMAC) is a United States-based conservative advocacy organization and interest group, founded in 2007. Its president and founder is Daniel C. Weber, a retired insurance agency owner. AMAC is a membership organization for people age 50 and over. The group calls itself the conservative alternative to the AARP. It is one of several organizations to position itself as conservative rivals to the AARP; others include the American Seniors Association and 60 Plus Association.