Chapter 22 Vocab- Katie Smart

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Across
  1. 1. a tough outer protective layer, especially that of an animal or plan
  2. 5. a flowering plant's unit of reproduction, capable of developing into another such plant
  3. 6. a division of vascular land plants containing a single class, Pinopsida
  4. 8. leaves that bear sporangia
  5. 10. a sticky flammable organic substance, insoluble in water, exuded by some trees and other plants
  6. 11. a division of plants, grouped within the gymnosperms, that consists of some 70 species across the three relict genera: Gnetum, Welwitschia, and Ephedra
  7. 12. a plant that has seeds unprotected by an ovary or fruit
Down
  1. 2. monotypic genus of highly unusual non-flowering plants
  2. 3. the central part of an ovule, containing the embryo sac
  3. 4. seed plants with a long fossil history that were formerly more abundant and more diverse than they are today
  4. 7. each of the microscopic particles, typically single cells, of which pollen is composed
  5. 9. having the male and female reproductive organs in separate individuals.
  6. 13. the protective outer coat of a seed.