Across
- 4. No backbone
- 8. produce both egg and sperm
- 10. arm-like structures for grabbing food
- 11. cells they all work separately from each other
- 12. can be broken in half and both halves can grow back and continue to live
- 13. Has nucleus
- 15. attaches to the intestine of the host to eat already digested food.
Down
- 1. Simplest of all animals
- 2. arrangement of body parts
- 3. Has backbone and spinal cord
- 5. attached to one place their entire life time
- 6. The study of animals
- 7. one cell no nucleus
- 9. there is no order to body parts
- 14. symmetry