Heterochrony in Hydractiniid Hydroids
{'Code': '08010207', 'Directorate': {'Abbreviation': 'BIO', 'LongName': 'Direct For Biological Sciences'}, 'Division': {'Abbreviation': 'DEB', 'LongName': 'Division Of Environmental Biology'}}
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For over a century, comparative biologists have documented                 that evolutionary change often occurs through alterations in the                timing of developmental events, i.e., heterochrony, but only in                 the past decade, have molecular tools become available to                       determine the mechanisms of development.  As these tools are                    applied to model systems, a synthetic understanding of the                      mechanistic underpinnings of a major mode of evolutionary change                is a realistic expectation.                                                          This work seeks to establish such a synthesis.  As a first                 step, it will establish which of several alternative cellular                   processes have undergone evolutionary change in a known phylogeny               of hydroids (Phylum Hydrozoa) and will establish which of those                 traits display variation capable of being inherited.
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[{'Code': '1171', 'Text': 'PHYLOGENETIC SYSTEMATICS'}, {'Code': '9145', 'Text': 'SPECIAL PROGRAMS-RESERVE'}]
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