1. _______ animals live on land.   Aerial   Arboreal   Terrestrial   Hint Half-n-half Clue   2. The nerve carrying messages from the ear to the brain is the _______ nerve.   auditory   optical   olfactory   Half-n-half Clue   3. A short-sighted person can see a distant object but has difficulty in seeing a near object.   True   False   4. _______ animals spend much of their time in air.   Aerial   Arboreal   Aquatic   Half-n-half Clue   5. _______ is a unicellular animal.   Amoeba   Spirogyra   Chlamydomonas   Half-n-half Clue   6. _______ animals live on trees.   Terrestrial   Aerial   Arboreal   Half-n-half Clue   7. Pick the "odd one out" (with reference to crustaceans and molluscs).   Mussel   Shrimp   Crab   Half-n-half Clue