Crossword on Unique features of Animals

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Across
  1. 3. It uses secret passwords to teach their younger ones(7).
  2. 5. It freezes itself without dying(4).
  3. 7. It has no stomach(8).
  4. 9. It sleeps for 3yrs(5).
  5. 10. It can swim forward only(5).
  6. 13. It can detect cancer of its owner(3).
  7. 14. It adopts orphans(8).
  8. 15. It also peels and eats like humans(6).
Down
  1. 1. It lives alone(5).
  2. 2. It has three hearts(7).
  3. 4. It can sleep up to 22hrs a day(5).
  4. 6. It can lift 50 times of its weight(3).
  5. 8. It is a Scotland national animal(7).
  6. 11. It can view 350degree(5).
  7. 12. It has a black tongue(7).
  8. 13. These use names for one another to identify(8).