1. Slow-worms and grass-snakes can be classified as reptiles which is one of the classes of vertebrates.   False   True   2. The nerve carrying messages from the ear to the brain is the _______ nerve.   auditory   optical   olfactory   Hint Half-n-half Clue   3. Each of the hind feet of a frog has 4 toes.   True   False   4. _______ animals live on land.   Aerial   Terrestrial   Arboreal   Half-n-half Clue   5. The nerve carrying messages from the nose to the brain is the _______ nerve.   gustatory   auditory   olfactory   Half-n-half Clue   6. The nerve carrying messages from the eye to the brain is the _______ nerve.   optical   olfactory   auditory   Half-n-half Clue   7. Which of the following two develop first in a tadpole?   Hind Legs   Front Legs