Across
- 3. An organism that gets food by eating other living things.
- 5. An animal with a backbone.
- 6. The living thing a virus or parasite lives in or on.
- 8. A living thing, like a plant, animal, or bacteria.
- 13. An animal without a backbone.
- 16. An organism that makes its own food, usually with sunlight.
- 17. The green part of plant cells that makes food using sunlight.
- 19. Keeping a stable inside environment, even when outside changes.
- 20. A tiny particle that can only live and multiply inside a host.
Down
- 1. Part of a plant that takes in water and nutrients from soil.
- 2. Scientist who proved that maggots come from flies, not meat.
- 4. The old, false idea that living things could come from nonliving things.
- 7. Part of a plant that holds it up and carries water and food.
- 9. Organisms like mushrooms or mold that absorb food from other things.
- 10. Simple organisms that are not plants, animals, or fungi (like amoeba).
- 11. The stiff outer layer around plant cells that gives them shape.
- 12. Scientist who showed that germs cause disease and disproved spontaneous generation.
- 14. Part of a plant that captures sunlight for photosynthesis.
- 15. Single-celled organisms; some helpful, some harmful.
- 18. The smallest unit of life; building block of all living things.