Chapter 22 Vocabulary

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Across
  1. 5. the central part of an ovule, containing the embryo sac.
  2. 6. having the male and female reproductive organs in separate individuals.
  3. 7. a plant that has seeds unprotected by an ovary or fruit.
  4. 9. each of the microscopic particles, typically single cells, of which pollen is composed
  5. 10. intermediate appearances in ferns and palms.
  6. 11. used in some classifications for one of five subdivisions of Gymnospermophyta.
  7. 13. the protective outer coat of a seed.
Down
  1. 1. a division of plants, grouped within the gymnosperms
  2. 2. a vascular plant
  3. 3. a flowering plant's unit of reproduction, capable of developing into another such plant
  4. 4. a tough outer protective layer, especially that of an animal or plant.
  5. 8. a leaf that bears sporangia
  6. 12. a sticky flammable organic substance, insoluble in water, exuded by some trees and other plants