Rapid plant movement slower "growth-movements" of plants, called tropisms. Tropisms encompass movements that lead to physical, permanent alterations of the plant while rapid plant movements are usually reversible or occur at over a shorter span of time. A variety of mechanisms are utilized by plants in order to achieve these fast movements. Extremely fast movements such as the explosive spore dispersal techniques of "Sphagnum" mosses may involve increasing internal pressure via dehydration, causing a sudden propulsion of spores up or through the rapid opening of the "flower" opening triggered by insect pollination. Fast movement can also be expressed in predatory plants, where the
Honda D-Type was completed in August 1949. Production began at the company's Hamamatsu factory. By late 1949 frames for the D-Type were being produced in the Yamashita plant in Hamamatsu and engines were coming from the Noguchi-cho plant. Officially the origin of the "Dream" name is unknown. The most commonly reported story is that at a party to celebrate the completion of the D-Type an employee spontaneously remarked "It's like a dream!" Honda felt that the D-Type was a step on the path to fulfilling his own aspirations, and made the bike's official name "Dream Type D". The D-Type proved popular and