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.
StabiliTrak not only helps to enhance vehicle safety but also increases driver confidence and control. Electronic Stability Control goes by many names. It's called Active Handling on Corvette and StabiliTrak on most other GM vehicles. In all cases it provides the same benefits. Key benefits include: Helping the driver to maintain control of the vehicle during certain low traction driving conditions such as ice, snow, gravel, wet pavement and uneven road surfaces. 1  Helping the driver to maintain control of the vehicle in emergency lane changes or avoidance maneuvers. 2  Helping the driver to avoid collisions.