Across
- 3. sticky clear substance
- 6. the outer boundary layer of a seed
- 7. modified leaves that bear a sporangium or sporangia
- 9. member of the phylum gnetophyta that is classified with gymnosperms but has angiosperm like characteristics
- 10. highly unusual non-flowering plants
- 12. having unisexual flowers or cones, with the male flowers or cones of the same species
- 13. a mature ovule containing an embryo and bound by a protective seed coat
Down
- 1. a plant whose seeds are not enclosed within an ovary during their development
- 2. seed plants
- 4. the outermost layer of an an ovule
- 5. a structure derived from the microscope of seed plants that develops into a male gametophyte
- 8. vascular land plants
- 11. ovule tissue in which an embryo sac develops