CELLS

4. power required for sustained activity
5. a clear jell-like fluid inside a cell
7. an optical instrument used for viewing very small objects
10. dioxide, plants breathe this gas in and humans breathe this gas out
12. food producing organelle found in plant cells that convert light energy iinto sugars
13. small infective agent that replicates itself inside a cell
14. smallest living unit of a plant or animal
15. substances that can be eaten to sustain life

1. a gas which animals, including humans, need to survive
2. an illness that affects a living thing preventing the body from working normally
3. an organelle found in large numbers in most cells
6. membrane, the outer wall of animal cell
8. this is a living thing
9. a living organism that lives on organic matter
11. the part of the cell which controls it