Across
- 2. a division of vascular land plants containing a single extant class, Pinopsida. They are gymnosperms, cone-bearing seed plants.
- 4. coat the outer boundary layer of a seed; it is developed from the integument
- 6. a plant whose seeds are not enclosed within an ovary during their development
- 10. A division of trees comprising the ginkgos.
- 11. palmlike gymnosperms
- 12. ovule tissue within which an embryo sac develops
- 13. mature ovules containing an embryo and bound by a protective seed coat
Down
- 1. a tubular duct of many conifers and some angiosperms that is lined with resin-secreting cells
- 3. the outermost layer of an ovule; usually develops into a seed coat
- 5. a division of plants, grouped within the gymnosperms that consists of some 70 species across the three relict genera
- 7. modified leaves that bare a sporangium or sporangia
- 8. having unisexual flowers or cones, with the male flowers or cones confined to certain plants and the female flowers or cones of the same species confined to different plants
- 9. grain a structure derived from the microspore of seed plants that develops into a male gametophyte