Cell division is the process by which a parent cell divides into two or more daughter cells. Cell division usually occurs as part of a larger cell cycle.
Neptune's atmosphere, like Jupiter's and Saturn's, is composed primarily of hydrogen and helium, along with traces of hydrocarbons and possibly nitrogen; it contains a higher proportion of ices such as water, ammonia, and methane.
Neptune consists primarily of 80% hydrogen and 19% helium. In smaller amounts, it also consists of water, methane, ammonia, and other compounds that can form ice in our solar system's temperatures.Neptune is classified as an ice giant planet, mainly made of the ice-forming molecules water, ammonia, and methane as a liquid mixture above what is thought to be a rocky core.eptune is made up of hydrogen, helium, water, and minerals known as silicates. There is no water on Neptune. As a matter of fact, as a gas giant, it is impossible for Neptu â¦ ne to hold water.