it can shut down
an nucleus.
nucleus
Most do, some don't. A mammalian red blood cell lacks a nucleus.
Nucleus Of The Eukaryotic Cell
One example would be the red blood cell, though in some animals such as birds they do have a nucleus per cell.
the conrtol station of a cell is called a nucleus. Although some cells do not have a nucleus, 90% of all cells do.
what would happen if you had a cell in water and molecules were in the cell and some were out of the cell what would most likely happen after a period of time?
Mammal RBC's do have nuclei in them in their early stages, but by the time they reach maturity the nucleus is gone. There is no need for the nucleus after maturity since the cell's function is fairly passive. A nucleus would be required if the cell needed to produce a product or perform a task like cell division, but since it doesn't need to do these things a nucleus is not necessary. The nucleus is required at the early stages in order to produce the hemoglobin that eventually fills the cell. If the nucleus didn't disappear it would either make the cell too large to slip through capillaries or would reduce the oxygen carrying ability of the cell by displacing some of the hemoglobin that would fill it.
Nucleus of An AtomThe nucleus of an atom is a dense region consisting of protons and neutrons. The nucleus is found in the center of an atom. More than 99% of the atom's mass is found in the nucleus.Nucleus of a CellA cell's nucleus contains much of the genetic material. Most people think of the nucleus as the "brain" of a cell. Inside the nucleus is the nucleolus, which produces ribosomes.
The mature red blood cell does not have a nucleus. Some of the cells that turn into red blood cells do have a nucleus however.
The cell nucleus and mitochondria are some examples.
The organelle called the nucleus contains DNA in the cell.