Chapter 18!

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Across
  1. 4. meristems are found at the tips of roots and shoots.
  2. 5. endosperm cells are 3n, so they are ______ cells.
  3. 7. plants decieve animals by resembling a female insect to achieve pollination
  4. 8. with burrs or with tough coats that need to be digested prior to germination rely on these to disperse them.
  5. 9. chamber containing the ovules
  6. 10. reproductive structure in flowering plants
  7. 11. structures in angiosperms that attract pollenators.
  8. 13. of the two cells in a pollen grain will form a pollen ______.
  9. 14. non-seed plants produce ______ instead of seeds.
  10. 15. and animal aid are means of _______
  11. 16. kind of growth occurs in the lateral meristem and responsible for the production of wood
  12. 18. can continue to grow until resources become limited. They exhibit ____ growth.
  13. 19. meristem cells are found around the circumfrence of the shoot.
  14. 22. of the egg cell produces this diploid cell that will divide and form the embryo
  15. 25. that damage the bark around the circumfrence of a tree. Can be life threatening because the living cells in a tree are found beneath the bark
  16. 27. grains contain two _____ cells
  17. 28. plants offer animals nector to transfer pollen grains between individuals to achieve pollination
  18. 30. tissue surrounds developing embryo and forms a hard casing making a ____ coat.
  19. 32. of pollen grain production
  20. 33. can be made up of large amounts of _____ tissue.
  21. 34. fusing with a sperm cell, the central cell of the egg sac form the ______
  22. 35. _____ fertilization one sperm fertilizes the egg cell and the other fuses with the central cell of the embryo sac
Down
  1. 1. structure of wood.
  2. 2. spores in angiosperms and gymnosperms form ______.
  3. 3. landing site for pollen
  4. 6. that supports the anther
  5. 12. have several methods, such as staggered maturation, to prevent this (two words, hyphenated)
  6. 17. multi-step process by which a seed sends out roots and shoots when it senses the right conditions for life.
  7. 20. stalk of the stigma
  8. 21. reproductive structure in a flower
  9. 23. the age of a tree (two words, no spaces)
  10. 24. from the ovary wall
  11. 26. pollen grains produce _____ sperm cells.
  12. 29. singed, dust-like, and explosive seeds rely on this to aid in dispersal.
  13. 31. within floating fruits rely on this for dispersal.