The ability of plants to detect and respond to gravity is an essential characteristic for their survival. On Earth, the plant must direct its emerging roots downward in order to acquire the best possible chance of obtaining moisture and nutrients. When a seed germinates in any position other than with its root directly downward, the root and stem undergo a gravitropic response. Statoliths (gravity-sensing organelles) within the root cap respond ...
This study investigates the capabilities and limitations of the commercial telecommunications satellite system, Iridium. In view of the increasing demands for immediate communications in the modern theaters of war, the study analyzes the utility that Iridium could provide the U.S. military telecommunications architecture. The study uses a research methodology composed of a pyramid of subordinate research questions designed to answer a primary question of whether the Iridium system can provide ...