Research To Date Has Shown: 1  ADHD is a neurobiologic condition whose symptoms are also dependent on the child's environment. 2  A lower level of activity in the parts of the brain that control attention and activity level may be associated with ADHD. 3  ADHD frequently runs in families.
Mosaic (genetics) In genetics, a mosaic (or mosaicism) means the presence of two different genotypes in an individual which developed from a single fertilized egg. As a result, the individual has two or more genetically different cell lines derived from a single zygote. Unusual events in cell division (mitosis).
Mutualism is an economic theory and anarchist school of thought that advocates a society where each person might possess a means of production, either individually or in purely voluntary collectives, with trade representing equivalent amounts of labor in the free market. Integral to the scheme is the establishment of a mutual-credit bank that would lend to producers at a minimal interest rate, just high enough to cover administration. Mutualism is based on a labor theory of value that holds that when labor or its product is sold, in exchange it ought to receive goods or services embodying the amount of labor necessary to produce an article of exactly similar and equal utility. Mutualism originated from the writings of philosopher Pierre-Joseph Proudhon.