biology

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Across
  1. 6. Exoskeleton’s of Arthropods are made of ________
  2. 8. ________ are in the Class Arachnida and have a stinger on its tail.
  3. 10. There are _______ subphylum in the phylum Arthropoda.
  4. 12. Class_____________ has members with two pairs of short legs on each body segment, a rounded body, and a hard external skeleton
  5. 14. The hard outside of an arthropod is called the _______
Down
  1. 1. arthropods have well-developed _________ systems
  2. 2. Arthropods are all _________
  3. 3. Arthropods are the largest _______ in the animal kingdom
  4. 4. arthropods have bilateral symmetry
  5. 5. arthropods have open _________ systems
  6. 7. Arthropods are _______ -blooded.
  7. 9. arthropods all developed from ____
  8. 11. Arthropods have _______ appendages
  9. 13. arthropods must______to grow
  10. 15. Arthropods make up nearly _________ percent of all animal species