1. Most contagious disease   Tuberculosis   Malaria   AIDS   Common cold   Leprosy   Hint Half-n-half Clue   2. Fastest land animal   Antelope   Hare   Cheetah   Tiger   Gazelle   Half-n-half Clue   3. Fastest fish   Eel   Shark   Bluefin Tuna   Cosmopolitan Sailfish   Swordfish   Half-n-half Clue   4. Heaviest dog (breed)   English Mastiff or St. Bernard   Great Dane   Irish Wolfhound   German Shepherd   Bull Dog   Half-n-half Clue   5. Largest land animal   Rhinoceros   Giraffe   Lion   Hippopotamus   Elephant   Half-n-half Clue   6. Smallest bird   Kingfisher   Sparrow   Kiwi   Kittiwake   Hummingbird   Half-n-half Clue   7. Fastest growing plant   Banyan   Ferns   Palm   Bamboo   Coconut   Half-n-half Clue