Across
- 2. tough outer protective layer, especially that of an animal or plant
- 4. central part of an ovule, containing the embryo sac
- 6. group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes
- 7. seed plants with a long fossil history that were formerly more abundant and more diverse than they are today
- 10. each of the microscopic particles, typically single cells, of which pollen is composed
- 11. (of a plant or invertebrate animal) having the male and female reproductive organs in separate individuals
- 12. division of plants, grouped within the gymnosperms, that consists of some 70 species across the three relict genera: Gnetum, Welwitschia, and Ephedra
- 13. "solid or highly viscous substance" of plant or synthetic origin that is typically convertible into polymers
Down
- 1. Coniferophyta or Coniferae, or commonly as conifers, are a division of vascular land plants containing a single class
- 3. monotypic genus of highly unusual non-flowering plants
- 5. embryonic plant enclosed in a protective outer covering
- 8. leaf that bears sporangia
- 9. protective outer coat of a seed