Science test

12345678910
Across
  1. 3. the study of the structure of an organism
  2. 5. animal without a backbone
  3. 8. connective tissue that is more flexible than bone
  4. 9. outer skeleton
  5. 10. the organism that a parasite or virus lives in or on
Down
  1. 1. the process of shedding an outgrown exoskeleton
  2. 2. animal with a backbone
  3. 4. a mollusk with 1 or no shell
  4. 6. many lines of symmetry that all pass through a central point
  5. 7. the part of the nervous system that controls most functions of the body