what appear within animals that have a backbone?
animals without backbones nerves californium otters muscle jaws Birds fingernails
A B C D E F G H
Jaws appear within the vertebrates.
jaws appear within animals that have a backbone.
what appear within animals that have a backbone? (A) animals without backbones (B) nerves (C) californium (D) otters (E) muscle (F) jaws (G) Birds (H) fingernails