Multiple Choice, 2 pts each:

1. A shared derived characteristic for members of the arthropod subgroup that includes spiders is
   1. chelicerae. (YEAH RIGHT!)
   2. 10 legs. (incorrect)
   3. an endoskeleton. (incorrect)
   4. a mantle. (incorrect)
   5. 6 legs. (incorrect)
      Hint
2. Leeches are found in the phylum
   1. Mullusca. (incorrect)
   2. Arthropoda. (incorrect)
   3. Annelida. (WHATEVER!)
   4. Echinodermata. (incorrect)
   5. Platyhelminthes. (incorrect)
      Hint
3. Flatworms such as Planarians (Turbellaria) excrete their waste through the
   1. anus. (incorrect)
   2. mouth. (BRAVO!)
   3. gills. (incorrect)
   4. siphons. (incorrect)
   5. tentacles. (incorrect)
      Hint
4. Sponges contain these types of cells EXCEPT:
   1. choanocytes. (incorrect)
   2. epidermal cells. (incorrect)
   3. porocytes. (incorrect)
   4. amoebocytes. (incorrect)
   5. cnidocytes. (PEACHY!)
      Hint

Fill In (one or two words), 2 pts each:

5. Arthropods have jointed appendages and an exoskeleton made of                    .
   Hint