Across
- 5. the central part of an ovule, containing the embryo sac
- 9. a division of vascular land plants containing a single extant class
- 10. division of gymnosperms that includes only the extant Ginkgo biloba
- 13. the protective outer coat of a seed
Down
- 1. having the male and female reproductive organs in separate individuals
- 2. Any of a small but diverse phylum
- 3. a solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers
- 4. palmlike gymnosperms
- 6. a tough outer protective layer, especially that of an animal or plant
- 7. a leaf that bears sporangia
- 8. a plant that has seeds unprotected by an ovary or fruit
- 11. grain each of the microscopic particles, typically single cells, of which pollen is composed
- 12. - a flowering plant's unit of reproduction, capable of developing into another such plant