| Rating | Solver | Clue |
|---|---|---|
| SEED | Plant ovule | |
| OOSPORE | A fertilized oosphere in the ovule of a flowering plant. | |
| OOSPERE | An analogous mass of protoplasm in the ovule of a flowering plant; an embryonic vesicle. | |
| EXOSTOME | The small aperture or foremen in the outer coat of the ovule of a plant. | |
| IMPREGNABLE | Capable of being impregnated, as the egg of an animal, or the ovule of a plant. | |
| PROEMBRYO | The series of cells formed in the ovule of a flowering plant after fertilization, but before the formation of the embryo. | |