1. Cell -  The basic unit of structure and function of living objects.

2. Cell membrane - A small flexible barrier that covers a cell and controls which objects pass into and out of a cell.

3. Cell wall - A strong layer that surrounds the cells and living things and protects them.

4. Organelle - A tiny cell structure that takes out a specific function with the cell.

5. Tissue - Any types of material of which animals or plants are made or consisting of specialized cells and their products.

6. Organ - A part of an organism that is most of the time self-contained and it has a specific vital function, as the heart or liver in humans.

7. Unicellular - Ertain algae and spores, etc. Consisting of a single cell.

8. multicellular - Of an organism or part having or consisting of many cells.

9. Autotroph - An organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide and others.

10. Heterotroph - An organism deriving its nutritional requirements from complex organic substances.

11. Prokaryotic- A prokaryote is a single-celled organism that lacks a membrane.

12. A eukaryote is any organism whose cells contain a nucleus and other organelles enclosed within membrane.