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.
The Foucault gyrocompass is a one-axis astatic gyroscope whose axis is movable in the horizontal plane. Because of the gyroscopic moment generated by the earthâs rotation, its axis tends to coincide with the plane of the meridian.hen the axis AB of the rotor is not in the plane of the meridian (when it is deflected to the east or west), it will deviate from the plane of the horizon because of the earthâs rotation, since the rotor, in accordance with the properties of a free gyroscope, tends to maintain its orientation relative to the stars.