A cell is the basic structural and functional unit of all living organisms. It is the smallest unit of life that can replicate independently, and organisms can be made up of a single cell (unicellular) or multiple cells (multicellular).
Eukaryotic cells: These cells have a true nucleus and membrane-bound organelles. They are more complex in structure and are found in organisms such as plants, animals, fungi, and protists.
Cell Structure
The typical eukaryotic cell consists of several main parts:
Cell membrane: A semi-permeable membrane that encloses the cell and regulates the passage of substances in and out of the cell.
Develop and use models of Earth’s interior composition to illustrate the resulting magnetic field (e.g., magnetic poles) and to explain its measureable effects (e.g., protection from cosmic radiation).