| A | B |
|---|
| Cell size is limited by the | cell's surface area-to-volume ratio |
| Which of the following statements is part of the cell theory? | all cells come from other cells |
| The surface area-to-volume ratio of a cell limits | the size of the cell |
| Two types of organisms whose cells do not have a nucleus are | bacteria and archaea |
| What is the smallest unit that can perform all the processes necessary for life? | organelle |
| Robert Hooke and Anton van Leeuwenhoek not only helped discover cells but also | helped develop the microscope |
| Leeuwenhoek called the single-celled organisms that he found in pond scum "animalcules." Today we know them as | protists |
| Scientist Matthias Schleiden contributed to the cell theory by concluding that | all plant parts were made of cells |
