Ferns Edit. In most ferns, gametophyte is a photosynthetic free living organism called a prothallus. For example, in the leptosporangiate fern Dryopteris, the gametophyte is a free-living, autotrophic prothallus that produces gametes and maintains the sporophyte during its early multicellular development.
It is therefore an object of the present invention to provide a gyro stabilized center tracking vehicle, of reduced complexity in which the gyro Spin axis is maintained in its normal position by forces reacting against the earth, and in which these forces are minimized by torquing the gyro frame about its pivot axis.nother object of the invention is to provide a gyro stabilized center-tracking trail vehicle in which a gravity sensitive mass applies a torque to the gyro frame in a direction to erect the vehicle upon tilt from a vertical or plumb line attitude.
There are often special looking electrical receptacles in bathrooms or kitchens that have Test and Reset buttons -- often black and red -- on them. Video. These are ground-fault circuit interrupters -- GFCIs or GFIs.Their purpose is to protect people from electrocution.till, if you have an outage of the receptacles in one of the rooms mentioned above, it may help to look for GFCI outlets in all of those areas and to reset them all. The reset button will need a forceful push. Avoid the test button. The search to find all possible GFIs needs to be persistent and thorough.