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  1. Describes having body parts equally arranged regularly around a central axis - sort of like the spokes on a bicycle.
  2.  
  3. `bilateral symmetry          `radial symmetry           `pseudocoel          `coelom
  4.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  5.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          B                                                                        The term used to describe those animals, where if divided down the middle, would have a right and a left half that would be mirror images of each other.
  6.  
  7. `bilateral symmetry         `radial symmetry           `pseudocoel         `coelom
  8.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  9.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          A                                                                        The system of canals in echinoderms that contain fluid which is supplied to the tube feet for feeding and movement.
  10.  
  11. `hydrostatic skeleton           `trachea           `Malphigian tubules            `water vascular system
  12.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  13.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          D                                                                        The phylum characterized by animals that have a notochord, nerve cord, pharyngeal gill slits, and a tail that extend beyond the anus in some point of its development.
  14.  
  15. `Echinodermata           `Porifera            `Chordata            `Arthropoda
  16.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  17.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          C                                                                        The water based skeleton providing shape and support to the annelids.
  18.  
  19. `hydrostatic skeleton         `trachea          `Malphigian tubules          `water vascular system
  20.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  21.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          A                                                                        The main body cavity of most animals with three layers, it is also filled with fluid-filled space between the inner and outer layers.
  22.  
  23. `bilateral symmetry          `radial symmetry          `pseudocoel            `coelom
  24.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  25.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          D                                                                        The term that describes that one end of an animal is the head.
  26.  
  27. `brain            `cephalopod             `cephalization           `pseudocoel
  28.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  29.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          C                                                                        An eye made up of many small eyes, like those seen in the insects.
  30.  
  31. `coelom          `compound eye           `simple eye         `pseudocoel
  32.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  33.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          B                                                                        Excretory devices in arthropods.
  34.  
  35. `hydrostatic skeleton            `trachea          `Malphigian tubules             `water vascular system
  36.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  37.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          C                                                                        Branching networks that are attached to the spiracles and are responsible for carrying oxygen to the body of arthropods.
  38.  
  39. `hydrostatic skeleton            `trachea              `Malphigian tubules            `water vascular system
  40.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  41.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          B                                                                        The process by which a larval form changes into an adult; typically seen in butterflies that were caterpillars in their larval state.
  42.  
  43. `metamorphosis            `molting           `cephalization             `bilateral symmetry
  44.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  45.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          A                                                                        The growth process in arthropods that involves shedding the old, smaller exoskeleton and secreting a new, larger exoskeleton.
  46.  
  47. `metamorphosis         `molting          `cephalization          `bilateral symmetry
  48.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  49.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          B                                                                        The long rod of stiffened tissue that helps support the body.
  50.  
  51. `pharyngeal gill slits          `notochord           `nerve cord
  52.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  53.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          B                                                                        Runs parallel to the notochord and develops into the brain and spinal cord.
  54.  
  55. `pharyngeal gill slits         `notochord          `nerve cord
  56.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  57.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          C                                                                        Paired organs that are used for respiration, feeding, or both at some point in the development of chordates.
  58.  
  59. `pharyngeal gill slits          `notochord             `nerve cord
  60.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     Multiple choice - please select the best answer that describes the following phrase or fills in the blank.
  61.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          A