1. A dolphin is _______.   an invertebrate   a vertebrate   2. _______ is a reptile.   An albatross   A frog   A fox   A sardine   An alligator   Hint Half-n-half Clue   3. A shark is _______.   a bird   an amphibian   a fish   a mammal   a reptile   Half-n-half Clue   4. A _______ is a vertebrate.   herring   jellyfish   5. A _______ is cold-blooded.   snake   polar bear   6. A whale is _______.   a fish   a reptile   a mammal   a bird   an amphibian   Half-n-half Clue   7. An _______ is an invertebrate.   amoeba   albatross