<p>ZooSemtest answers</p><p>1. Cephalization</p><p>2. A flexible rod of tissue along their back</p><p>3. Dorsal nerve cord, notochord, pharyngeal pouches</p><p>4. Segmentation, exoskeleton, digestive tract</p><p>5. Individual cells</p><p>6. Acoelomate</p><p>7. Echinoderm, chordates</p><p>8. Mollusk</p><p>9. Occur in some mollusks life cycle, a belt of cilia around their bodies, occurs in some annelids life cycle</p><p>10. Eating</p><p>11. Bivalves, cephalopods, gastropods</p><p>12. Squids</p><p>13. May consist of one or more pieces, provide protection, allows the attachment of muscles</p><p>14. Blood is released directly into spaces in the body tissues</p><p>15. Gills, skin, mantle cavity</p><p>16. Chambered nautiluses</p><p>17. Segmented body patterns</p><p>18. Blood moves more efficiently through the tubes of a closed circulatory system</p><p>19. Associated with reproduction</p><p>20. Help release nutrients into the soil, aerate the soil as they move through it, break up the soil where they live</p><p>21. Use suckers to help move, are segmented, may be parasitic 22. Walking legs, some modified into antennae, modified into pinchers</p><p>23. Both waterproof coatings</p><p>24. Segmentation, chitinous exoskeleton, jointed appendages</p><p>25. Chitin</p><p>26. Arthropods</p><p>27. Jointed appendages, exoskeleton, segmented bodies</p><p>28. Crustacean</p><p>29. Spiders, scorpions, horseshoe crab</p><p>30. Arachnidan</p><p>31. Used to produce silk</p><p>32. Used to capture and handle their prey</p><p>33. Decaying plants</p><p>34. One pair of legs per segment</p><p>35. Two wings</p><p>36. Reproduce in large numbers, ability to fly, several species can live in the same area without competing for food</p><p>37. Insects</p><p>38. Wings, 3 body regions, endoskeleton</p><p>39. Removes waste</p><p>40. Drones and queen reproduction, workers-females</p><p>41. Gills, lungs, skin</p><p>42. Usually return to water to reproduce</p><p>43. Caudate</p><p>44. Pumps both oxygenated and deoxygenated, 3 chambered</p><p>45. They fertilize externally, jelly-like coating is permeable to water 46. Series of changes in a life cycle</p><p>47. Meteorite struck the earth and caused a thick dust cloud</p><p>48. Protective membranes in reptile, bird and mammal eggs</p><p>49. Amniotic egg</p><p>50. Chorion</p><p>51. Dry and water tight</p><p>52. 2 atria, 1 ventricle, alligators and crocodiles are different</p><p>53. By changing the air pressure in their mouths</p><p>54. Ecto- rely on the environment to keep their bodies warm, endo- produce heat within their own bodies</p><p>55. Chelonian</p><p>56. Squamata</p><p>57. Heat-sensing organ between the eyes and nostril on each side of the head</p><p>58. The spiny crest on their back</p>