1. A _______ is a mammal.   crow   crocodile   monkey   frog   mackerel   Hint Half-n-half Clue   2. A _______ is a vertebrate.   jellyfish   herring   3. A spider is _______.   an invertebrate   a vertebrate   4. A _______ is a fish.   sardine   horse   frog   lizard   dove   Half-n-half Clue   5. _______ is a reptile.   A fox   A frog   An alligator   A sardine   An albatross   Half-n-half Clue   6. A mosquito is _______.   an invertebrate   a vertebrate   7. A _______ is an amphibian.   dog   lizard   raven   newt   salmon   Half-n-half Clue