1.The Cell
All living things are made of one or more cells. A cell is the smallest unit of life and all living things begin with a single cell.
Single-celled or unicellular organisms
Paramecium is a microscopic unicellular organism that moves using hair-like structures called cilia and flagella.
2. Parts of a cell
You have observed an example of an animal cell-the human cheek cell.
You have also observed 2 different types of plant cell: the onion cells and Elodea cells. One is photosynthetic because it contains chloroplasts.
3. Producing New cells
Cells increase in number by a process called cell division. Both unicellular and multicellular organisms undergo cell division.
Unicellular organisms reproduce either by cell division or budding.
In cell division, the nucleus and the cytoplasm of a parent cell divide to form 2 identical daughter cells which then in turn divides further to form more cells.
For example yeast undergo budding.
Notice the parent cell buds and forms another, smaller daughter cell.
