Biology Ch. 21

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Across
  1. 3. the mature ovary of a flower
  2. 5. potent plant chemicals that contain nitrogen, some are medicinal in small amounts
  3. 8. flowering plants whose embryos have two seed leaves
  4. 9. a fibrous material made up of dead cells that are part of the vascular systems of some plants
  5. 10. the study of drugs and their effects on the body
  6. 11. a seed plant whose seeds are not enclosed in fruit, cone-bearing evergreens
  7. 14. the study of plants
  8. 15. the reproductive structure of flowering plants
  9. 16. a two-celled structure that contains a cell that will divide to form sperm
  10. 17. a waxy, waterproof layer that covers the surface of a plant
  11. 18. multicellular eukaryotes, most of which produce their own food and adapted to life on land
Down
  1. 1. explores how people in different cultures use plants
  2. 2. a material that hardens the cell walls of some vascular tissues to give a plant support
  3. 4. a collection of specialized tissues that bring water and mineral nutrients to the leaves of plants
  4. 6. a seed plant that has seeds enclosed in some type of fruit, flowering plants
  5. 7. an embryonic leaf inside a seed
  6. 12. flowering plants whose embryos have one seed leaf
  7. 13. this occurs when pollen meets female reproductive parts of the same plant species
  8. 19. a storage device for a plant embryo