Across
- 2. the smallest unit of an organism
- 5. Humans breathe this gas out.
- 7. Sea creatures breathe oxygen dissolved in the water through their _________.
- 10. animals eating vegetation
- 11. the process through which plants make their own food
- 13. The plants' _______takes place at night.
- 14. Any living things is called an____________.
- 15. the main source of chemical energy for plants (the plant's food)
Down
- 1. organisms with one cell
- 3. The regulation of an organism’s internal, life-maintaining condition despite changes in the environment.
- 4. this plant curls up when you touch it
- 6. the life process through which living things get rid of the waste they don't need
- 8. How long an organism lives
- 9. animals eating meat
- 12. one of the things plants need to photosynthesize