flashcard notes on the WJEC GCSE Biology Unit 1 topic of Cells and movement across cell membranes based on the 2025-26 spec made for StMikes
| Front | what is a disadvantage of electron microscopes? |
| Back | they can only be used to study dead cells |
| Front | what are organ systems? |
| Back | a number of organs working together to carry out specific functions |
| Front | how do cells control the movement of substances in and out of them? |
| Back | every substance that enters or leaves a cell must cross the cell membrane; it is a selectively permeable memrane |