Across
- 2. what cell walls are made from
- 4. where respiration takes place
- 6. hole in leaf which oxygen and carbon dioxide move in and out of
- 7. what happens to enzymes heated to high temperatures
- 8. how oxygen gets into a leaf
Down
- 1. controls what moves in and out of a cell
- 3. the building blocks of protein
- 5. chemical reaction that releases energy