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Article: Evolution of head development.(Evolution: A Molecular Point of View)(includes discussion)
- Article from:
- The Biological Bulletin
- Article date:
- June 1, 1999
- Author:
CopyrightCOPYRIGHT 1999 Marine Biological Laboratory. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Accumulating evidence indicates that genes regulating developmental processes are, to a large extent, common among the metazoans despite the great variety of body plans among them. A prominent example are the Hox genes which specify body regions along the anterior-posterior axis. Of interest are questions concerning the evolution of these genes. When did a particular gene first appear in metazoan evolution, and to what extent has its function been conserved? These questions can be addressed by examining members of the Cnidaria, as this phylum arose very early in metazoan evolution. Further, examining these issues in hydra is of particular value because the processes ...
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Article: Japanese Inventors Develop Ink Jet Recording Head ...
US Fed News Service, Including US State News;
June 27, 2008 ;
484 words
...ALEXANDRIA, Va., June 27 -- Tamaki Sato, Kazuhiro Asai and Takumi Suzuki, all from Kanagawa, Japan, and Maki Hatta of Tokyo, have developed a liquid discharging head. According to the U.S. Patent & Trademark Office: "A method for forming an ink jet recording head includes at least a step of
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