Pollen tube through wind, water or pollinators. The last step before fertilization is the growth of the pollen tube to transfer non-motile sperm to the protected egg. Pollen tubes are unique to plants and their structure had evolved over plant history. The pollen tube formation is complex and the mechanism is not fully understood, but is of great interest to scientists. Pollen is produced by the stamen, the male reproductive organ of the flower. Each pollen grain contains a vegetative cell, and a generative cell that divides to form two sperm cells. The pollen is delivered by the opening of anthers for
The Grains of Sand The Grains of Sand The Grains of Sand were an American garage rock band formed in Los Angeles, California in 1965. For a period, the group exerted a promising presence in Los Angeles's music scene, releasing three singles in their recording career, the second of which was produced by Kim Fowley. Much of the band's material found on their first two releases have since been compiled on several compilation albums, including "Pebbles, Volume 1", and is cited by critics as classics of the garage rock genre. Formed in early 1965 by R&B enthusists Douglas "Red" Mark and Dave Hodgkins, the