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- W1569388941 endingPage "861" @default.
- W1569388941 startingPage "844" @default.
- W1569388941 abstract "Biology needs a concept of individuality in order to distinguish organisms from parts of organisms and from groups of organisms, to count individuals and compare traits across taxa, and to distinguish growth from reproduction. Most of the proposed criteria for individuality were designed for 'unitary' or 'paradigm' organisms: contiguous, functionally and physiologically integrated, obligately sexually reproducing multicellular organisms with a germ line sequestered early in development. However, the vast majority of the diversity of life on Earth does not conform to all of these criteria. We consider the issue of individuality in the 'minor' multicellular taxa, which collectively span a large portion of the eukaryotic tree of life, reviewing their general features and focusing on a model species for each group. When the criteria designed for unitary organisms are applied to other groups, they often give conflicting answers or no answer at all to the question of whether or not a given unit is an individual. Complex life cycles, intimate bacterial symbioses, aggregative development, and strange genetic features complicate the picture. The great age of some of the groups considered shows that 'intermediate' forms, those with some but not all of the traits traditionally associated with individuality, cannot reasonably be considered ephemeral or assumed transitional. We discuss a handful of recent attempts to reconcile the many proposed criteria for individuality and to provide criteria that can be applied across all the domains of life. Finally, we argue that individuality should be defined without reference to any particular taxon and that understanding the emergence of new kinds of individuals requires recognizing individuality as a matter of degree." @default.
- W1569388941 created "2016-06-24" @default.
- W1569388941 creator A5018398465 @default.
- W1569388941 creator A5018638372 @default.
- W1569388941 creator A5086374296 @default.
- W1569388941 creator A5091683746 @default.
- W1569388941 date "2013-03-01" @default.
- W1569388941 modified "2023-10-16" @default.
- W1569388941 title "Cellular differentiation and individuality in the ‘minor’ multicellular taxa" @default.
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