| A | B |
|---|
| Cell | The basic unit of life |
| Virus | Tiny particle that goes into a cell and makes more of itself |
| Bacteria | Single-celled organism (prokaryote) with no nucleus |
| Cell membrane | A cell structure that acts like a security guard and tells which substances can leave or enter the cell |
| Nucleus | Control center of the cell, the boss |
| Cytoplasm | Jelly fluid inside of a cell |
| Cell wall | The strong layer around the cell membrane (not every cell has one) |
| Chloroplast | Where photosynthesis happens in plant and algae cells |
