Plant Evolution Intro

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Across
  1. 4. spore-producing structures in ferns
  2. 11. division of non-vascular, spore-producing plants eg hornworts and mosses
  3. 13. the diploid phase that reproduces asexually to form spores
  4. 14. the male microgametophyte of seed plants that contains the sperm cells
  5. 15. land plant spores that develop into the female gametophyte
  6. 16. substance found in some cell walls to provide support eg in bark
  7. 17. land plants that develop from an embryo protected by maternal tissue
  8. 18. the part of the ovary that houses female germ cells and becomes the seed after fertilization
  9. 19. the haploid phase that produces the gametes that form zygotes
Down
  1. 1. the spread of plant seeds away from the parent plant
  2. 2. hair-like filaments used by bryophytes to anchor themselves and to absorb water and minerals
  3. 3. system composed of conducting tissues (xylem and phloem)
  4. 5. hydrophobic protective layer on the leaf epidermis
  5. 6. non-flowering seed-producing plants eg gingkos and conifers
  6. 7. a haploid reproductive cell that gives rise to a gametophyte
  7. 8. species of archaeplastid that land plants evolved from
  8. 9. non-parasitic plants that grow on other plants and absorb nutrients from rain and air eg orchids
  9. 10. pores in the leaf epidermis that facilitate gaseous exchange
  10. 12. flowering seed-producing plants eg roses and lilies