There are three kinds of answers: ones that are mostly right, ones that are mostly wrong, and those that once were right but now are wrong. Mount St. Helens was formed by volcanic eruptions and flows over a long period of time.The Cascade Mountains were formed by the collision of the Juan de Fuca Plate with the North American plate. Lava was forced upward to create volcanoes such as Mount Adams and Mount St. Helens.The modern summit domes were the Kalama dome, formed between 1490 and 1647, and the Goat Rocks dome, formed between 1800 and 1857.here are three kinds of answers: ones that are mostly right, ones that are mostly wrong, and those that once were right but now are wrong. Mount St. Helens was formed by volcanic eruptions and flows over a long period of time.
fertilization (Noun). The act or process of rendering fertile. fertilization (Noun). The act of fecundating or impregnating animal or vegetable gametes; esp., the process by which in flowers the pollen renders the ovule fertile, or an analogous process in flowerless plants; fecundation; impregnation.
Double fertilization in Arabidopsis. Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms). This process involves the joining of a female gametophyte (megagametophyte, also called the embryo sac) with two male gametes (sperm).he ovary, surrounding the ovules, develops into the fruit, which protects the seeds and may function to disperse them. The two central cell maternal nuclei (polar nuclei) that contribute to the endosperm, arise by mitosis from the same single meiotic product that gave rise to the egg.