Biology

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Across
  1. 3. stinging cells
  2. 5. fungus roots
  3. 11. partially covered by connective tissues
  4. 13. body cavity fully covered by connective tissues
  5. 14. study of animals
  6. 15. sense organs and nerve cells are concentrated on the head
  7. 17. study of interrelations between humans and plants
  8. 19. site of gamete production in plants
Down
  1. 1. sexes are separate
  2. 2. haploid stage
  3. 4. poriferan cavity
  4. 6. conducts water
  5. 7. one organism possesses two sexes
  6. 8. help facilitate diffusion of oxygen and carbon dioxide in plants
  7. 9. distributes sugars
  8. 10. body parts extend from a central point
  9. 12. diploid stage
  10. 16. no body cavity
  11. 18. distinct anterior and posterior ends and right and left sides