Across
- 6. Light is needed for a process carried out by plants.
- 8. A filamentous aquatic plant.
- 9. Small river
- 10. An organism comprised by only one cell.
Down
- 1. A gas that organisms need.
- 2. Tiny single-celled plants that float in the sea.
- 3. They are the only organism on the planet with cell walls composed of transparent, opaline silica.
- 4. A way of reproduction without sex?
- 5. What gives the color green to plants?
- 7. One of the shapes a diatom is found.