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 in early 1966. Around the same time, the Rockin' Bugs agreed to change the group moniker to the Grains of Sand, inspired by a pair of college students studying chemistry while the band members proposed possible alternatives. The Grains of Sand entered Golden Star Studios in Hollywood to record "That's When Your Happiness Began", a catchy pop tune written by the Addrisi Brothers, along with the fuzz-tinged Hodgkins-original "She Needs Me". Session musician Hal Blaine took part in the recording of "That's When Your Happiness Began", which was released, coupled by "She Needs Me" as its B-side, in February 1966.