frog

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Across
  1. 2. has a backbone, includes all mammals, birds, reptiles, amphibians, and fish
  2. 3. relating to water
  3. 5. the larval stage in the biological life cycle of amphibians
  4. 7. meat-eating
  5. 9. any member of the group of vertebrate animals characterized by their ability to exploit both aquatic and terrestrial habitats. cold-blooded
Down
  1. 1. transforms from eggs to adult through distinct stages
  2. 4. relating to earth
  3. 6. allow fish to take in oxygen from the surrounding water
  4. 7. (skin surface) respiration
  5. 8. frogs and toads