1. A _______ is a vertebrate.   starfish   snake   2. A shark is _______.   a fish   a mammal   a bird   a reptile   an amphibian   Hint Half-n-half Clue   3. _______ is a reptile.   A fox   A frog   A sardine   An alligator   An albatross   Half-n-half Clue   4. A _______ is a vertebrate.   herring   jellyfish   5. An _______ is an invertebrate.   amoeba   albatross   6. A _______ is a bird.   salamander   crocodile   cow   mackerel   pigeon   Half-n-half Clue   7. A _______ is warm-blooded.   lizard   raven