chapter 6

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Across
  1. 2. cells get their oxygen by diffusion across
  2. 6. sponges dont have a ______ system
  3. 14. cells that produce the current to draw in water into the sponge
  4. 16. mineral needed for hemoglobin to be able to carry oxygen
  5. 17. any free-living stage in the development of an animal
  6. 18. this type of digestion carried on by protozoa
  7. 19. the digestion inside a cell membrane carried on in sponges
  8. 20. cytoplasmic streaming inside the protozoa
  9. 23. enzymes belong to this organic group
  10. 25. radiolarians and forminiferans move by means of these
  11. 26. all protozoa in the phylum zoomastigophora move with these
Down
  1. 1. type of asexual reproduction in protozoa which produces identical offspring
  2. 3. inorganic compound in the water and soil needed by living things
  3. 4. outer layer of cells in a sponge
  4. 5. means zooplankton
  5. 7. these make up the "skeletal" network of the body of many sponges
  6. 8. process of breaking down starch or any large molecule into smaller molecules especially when energy is needed
  7. 9. some sponges have a soft network of protein fibers which make up their body
  8. 10. how sponges reproduce asexually
  9. 11. larval forms of fish and sponges are considered
  10. 12. small pores in the side of a sponge
  11. 13. minerals needed for strong bones teeth
  12. 15. inorganic substance that is the most abundant nutrient in living things
  13. 21. high-energy molecule that include oils
  14. 22. mean "attached to a substrate"
  15. 24. term meaning bottom dweller