Answer:
I'm not sure about 13 and 19.
13. Traits?
14. Hagfish
15. No, it doesn't have jaws.
16. Mammary glands.
17. Jaws and lungs.
18. Lizard, bird, cow, lion.
19. The bird?
20. Claws/nails, lungs, and jaws.
Also, this is a cladogram, in case you needed the info. :)
