Viaspace Giant King Grass shows high yield at California site. Viaspace Inc. has announced that the first harvest of Giant King Grass in the Imperial Valley of California, was completed on Sept. 2. At the University of California site in Holtville, California, two planting methods were compared.
Identical Twins occur when a single egg is fertilized by a single sperm to form one zygote (monozygotic) but the zygote then divides into two separate embryos. The biological mechanisms that prompt the single fertilized egg to split in two remain a mystery. The two embryos develop into foetuses sharing the same womb.
The Causes of Dizygotic (Fraternal) Twins. Dizygotic or fraternal twins form in the same way that all humans do, by the union of sperm and egg. The explanation for dizygotic twinning lies in the cause of hyperovulation, or the release of more than one egg in a cycle of ovulation. There are numerous reasons for hyperovulation, and any one or combination of factors can be attributed as the cause for fraternal twins. Hormones control the process of ovulation.