1. A _______ is a mammal.   crocodile   monkey   frog   mackerel   crow   Hint Half-n-half Clue   2. A toad is _______.   an amphibian   a bird   a mammal   a fish   a reptile   Half-n-half Clue   3. A whale is _______.   a fish   an amphibian   a bird   a mammal   a reptile   Half-n-half Clue   4. A shark is _______.   a fish   a reptile   a bird   a mammal   an amphibian   Half-n-half Clue   5. _______ is a reptile.   An albatross   A sardine   A frog   A fox   An alligator   Half-n-half Clue   6. An _______ is an invertebrate.   amoeba   albatross   7. A _______ is warm-blooded.   raven   lizard