variations in vertebrates and invertebrates

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Across
  1. 3. these animals have internal fertilization.
  2. 5. _________ have no legs and their bodies are shaped like worms.
  3. 7. ___________ have a backbone/spine.
  4. 9. these animals have joint legs and body segments.
  5. 10. this group of animals can breathe through their skin and are cold blooded.
Down
  1. 1. _____________ have NO back bone.
  2. 2. this group of animals have soft bodies.
  3. 4. these animals have 6 joint legs with wings.
  4. 6. woody the woodpecker belongs to this family.
  5. 8. these animals have 8 joined legs and have not wings.