yes they are small and they have no nucleus unlike eukaryotic cells that do have a nucleus and are large.
There are no exact sizes to nucleuses in plant cells.
a prokaryotic cell.
Every cell has a nucleus. Without a nucleus there is no DNA in the cell and if you didn't know the nucleus is the brain of the cell.
Prokaryotic cells are small and do not have membrane bound organelles or a nucleus. Eukaryotic cells do have membrane bound organelles, are larger, and have an enclosed nucleus.
nucleoid region, for those who happen to say nucleus, bacteria cells don't have a nucleus so this is in fact impossible.
These cells are called eukaryotes, and contain a nucleus and organellles, as opposed to the prokaryotic cells of the monera (bacteria) and blue-green algae which do not have a distinct nucleus.
Nucleus
Most of plant and animal cells' DNA is found in the nucleus, although a small amount is also found in the mitochondria (in both plant and animal cells) and in the chloroplasts (in plant cells).
Prokaryotic Cells are cells that have to have organelles that are not surrounded by a membrane and do have ribosomes. Their DNA is in the shape of a circle. They have no nucleus, the DNA is bunched up in the cytoplasm. The type of cells that are prokaryotic are bacteria and only bacteria cells.
The nucleus is the control center of the cell, and as all living things are made up of cells, all living things have AT LEAST on nucleus. Humans are made up of trillions of cells, therefore they have trillions of nuclei. However, one does not normally measure a species by nuclei. Animals with one nucleus would be so small, you need microscopes to see them, and strong ones at that.
The cells of eukaryotes will contain a nucleus.