In order for organisms to reproduce, two sex cells, or gametes, need to fuse together. One gamete comes from the female, and one comes from the male. Female gametes are also called eggs or ova. Female gametes are also called eggs or ova. They are created during the cellular reproduction process known as meiosis.
There is only one full moon each month because the moon only opposes the sun once per month in its orbit. The phases of the moon are caused by how much of its visible surface is illuminated by the sun's light, and a full moon only occurs when the moon is on the opposite side of the Earth from the sun. Continue Reading.
A normal year has 4 astronomical seasons - spring, summer, fall (autumn), and winter - with 3 months and normally 3 Full Moons each. When 1 of the astronomical seasons has 4 Full Moons, instead of the normal 3, the 3rd Full Moon is called a Blue Moon.