631Warm-blooded animals that generally have hair or fur and feed their young with milk are classified as what?
632Cold-blooded aquatic animals that breathe primarily using gills are generally classified as what?
633Animals such as frogs, which typically live part of their life in water and part on land, are classified as what?
634Which of the following is a well-known example of an amphibian?
635The platypus is an unusual mammal mainly notable for being one of the few mammals that reproduce by doing what?
636Which animal is generally considered the largest living mammal on Earth?
637Which animal is generally considered the largest living land animal on Earth?
638Which land animal is generally recognized as the fastest sprinter, capable of very high short bursts of speed?
639Which animal is generally recognized as the tallest living land animal?
640Among land animals, which one is commonly cited as having one of the longest natural lifespans?
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