Define the term cell. Also, define the types of cells.

Cell

1. A cell is a mass of cytoplasm bound by the cell membrane.
2. It is usually microscopic.
3. It is called as a structural and functional unit of life.

Cells are of two types i.e. prokaryotic cells and eukaryotic cells.

1. Prokaryotic cell - The cell which does not have a nucleus and membrane-bound organelles is called a prokaryotic cell. Example - bacteria, algae.
2. Eukaryotic cell - The cell which has a true nucleus and all the membrane-bound organelles is called a eukaryotic cell. Example - plant cell and animal cell.