1. Longest cells in the human body   Brain Cells   WBC   RBC   Megakaryocyte (blood cells)   Nerve Cells (Neurons)   Hint Half-n-half Clue   2. Most common blood group in humans   B +   A -   AB -   O   A +   Half-n-half Clue   3. Heaviest dog (breed)   Irish Wolfhound   Bull Dog   Great Dane   German Shepherd   English Mastiff or St. Bernard   Half-n-half Clue   4. Largest mammal   Blue Whale   Giraffe   Rhinoceros   Elephant   Hippopotamus   Half-n-half Clue   5. Largest predatory fish   Swordfish   Catfish   Electric Eel   Great White Shark   Piranha   Half-n-half Clue   6. Fastest land animal   Cheetah   Tiger   Gazelle   Antelope   Hare   Half-n-half Clue   7. Largest land animal   Hippopotamus   Elephant   Rhinoceros   Giraffe   Lion   Half-n-half Clue