Across Clues:
| 5. | photosynthetic bacteria with a bluish pigment called phycocyanin, and usually phycoerythrin too (13) |
| 7. | Domain of the most simple, prokaryotic life forms (8) |
| 10. | many cyanobacteria can convert gaseous nitrogen into NH4, a usable nutrient for photosynthesizers (17) |
| 11. | protozoan that secretes elaborate, beautiful silica skeletons, or "tests," because their skeletons do not dissolve they form a fine ooze on the seafloor in deep waters (11) |
| 16. | photosynthetic eukaryote, have symbiotic chloroplasts within a reduced eukaryotic membrane within their cell membrane, so small that hundreds could fit within a single diatom (11) |
| 17. | usually planktonic eukaryote which have one flagellum wrapped around their middle, and one trails freely, have a cellulose cell wall (14) |
Down Clues:
| 1. | photosynthetic bacteria with a bluish pigment called phycocyanin, and usually phycoerythrin too (13) |
| 2. | Domain of the most simple, prokaryotic life forms (8) |
| 3. | many cyanobacteria can convert gaseous nitrogen into NH4, a usable nutrient for photosynthesizers (17) |
| 4. | protozoan that secretes elaborate, beautiful silica skeletons, or "tests," because their skeletons do not dissolve they form a fine ooze on the seafloor in deep waters (11) |
| 5. | photosynthetic eukaryote, have symbiotic chloroplasts within a reduced eukaryotic membrane within their cell membrane, so small that hundreds could fit within a single diatom (11) |
| 6. | usually planktonic eukaryote which have one flagellum wrapped around their middle, and one trails freely, have a cellulose cell wall (14) |
| 8. | (0) |
| 9. | (0) |
| 12. | (0) |
| 13. | (0) |
| 14. | (0) |
| 15. | (0) |