Chapter 22 Vocab

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Across
  1. 5. leaf that bears sporangia
  2. 6. a division of plants, grouped within the gymnosperms, that consists of some 70 species across the three relict genera
  3. 7. are a division of vascular land plants containing a single class They are gymnosperms, cone-bearing seed plants.
  4. 13. a tough outer protective layer, especially that of an animal or plant.
Down
  1. 1. monotypic genus of highly unusual non-flowering plants
  2. 2. are a group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes
  3. 3. a thick and sticky clear substance made from plants or trees that is used to make plastics, pills, lacquers, inks, glues and other things
  4. 4. Cycads are seed plants with a long fossil history that were formerly more abundant and more diverse than they are today
  5. 8. grain one of the granular microspores that occur in pollen and give rise to the male gametophyte of a seed plant
  6. 9. the protective outer coat of a seed.
  7. 10. having the male and female reproductive organs in separate individuals.
  8. 11. the central part of an ovule, containing the embryo sac.
  9. 12. an embryonic plant enclosed in a protective outer covering