Chapter 22 Vocabulary

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Across
  1. 5. the central part of an ovule, containing the embryo sac
  2. 9. a division of vascular land plants containing a single extant class
  3. 10. division of gymnosperms that includes only the extant Ginkgo biloba
  4. 13. the protective outer coat of a seed
Down
  1. 1. having the male and female reproductive organs in separate individuals
  2. 2. Any of a small but diverse phylum
  3. 3. a solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers
  4. 4. palmlike gymnosperms
  5. 6. a tough outer protective layer, especially that of an animal or plant
  6. 7. a leaf that bears sporangia
  7. 8. a plant that has seeds unprotected by an ovary or fruit
  8. 11. grain each of the microscopic particles, typically single cells, of which pollen is composed
  9. 12. - a flowering plant's unit of reproduction, capable of developing into another such plant