Prokaryotic cells are single cells that evolved before eukaryotes, which are organisms whose cells contain nuclei and organelles. A prokaryotic cell has no true nucleus or membrane-bound structures called organelles. Pro... More »

Prokaryotic cells are simpler than eukaryotic cells. Eukaryotes have a nucleus and organelles while prokaryotes do not. Both types of cells have a plasma membrane and contain cytoplasm. More » Science Biology Cells

Prokaryotic cells divide by replicating a single DNA molecule, attaching each copy to opposite sides of the cell and then forming new cell membranes along the middle of the cell to divide into two new, genetically identi... More »

Eukaryotic cells are advanced cells that have, at minimum, a cellular membrane surrounding cytoplasm, a cytoskeleton and membrane-covered organelles. More advanced eukaryotic cells also contain a nucleus that protects ge... More » Science Biology Cells

Animal cells have many distinct characteristics when compared to plant cells, including their varied shapes, their many types of organelles, their centrioles, cilia and lysosomes, and their cell-to-cell junctions. Animal... More »

Organisms whose cells lack nuclei are called prokaryotic cells or prokaryotic organisms. They differ from organisms called eukaryotic, which have nuclei in most of their cells. More »

Cells are considered the smallest unit of life because they are the smallest components in living things, and some organisms, such as bacteria, are made up of single cells. In addition, each part of the animal body, incl... More »