1. A _______ is a vertebrate.   jellyfish   herring   2. An owl is _______.   a reptile   a mammal   an amphibian   a bird   a fish   Hint Half-n-half Clue   3. A _______ is cold-blooded.   snake   polar bear   4. A spider is _______.   an invertebrate   a vertebrate   5. A toad is _______.   an amphibian   a reptile   a fish   a mammal   a bird   Half-n-half Clue   6. A shark is _______.   an amphibian   a bird   a reptile   a fish   a mammal   Half-n-half Clue   7. A _______ is a mammal.   frog   mackerel   crocodile   crow   monkey   Half-n-half Clue