Across
- 2. - central part of an ovule
- 4. - plant that has seeds unprotected by an ovary or fruit
- 7. grain - have a tough coat that has a form characteristic of the pollen-producing plant
- 9. - used in some classifications for one of five subdivisions of Gymnospermophyta
- 10. division of plants, grouped within the gymnosperms
- 13. flowering plant's unit of reproduction
Down
- 1. - tough outer protective layer, especially that of an animal or plant.
- 3. - Cycadales and several extinct orders; possibly not a natural group
- 5. - division of vascular land plants
- 6. - sporophyll is a leaf that bears sporangia
- 8. - male and female reproductive organs in separate individuals.
- 11. - sticky flammable organic substance, insoluble in water, exuded by some trees and other plants
- 12. coat - the protective outer coat of a seed.