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Whales Whales are sea-living mammals. They therefore breathe air but cannot survive on land. Some species are very large indeed and the blue whale, which can exceed 30 m in length, is the largest animal to have lived on earth. Superficially, the whale looks rather like a fish, but there are important differences in its external structure; its tail consists of a pair of broad, flat, horizontal paddles (the tail of a fish is vertical) and it has a single nostril on top of its large, broad head. The skin is smooth and shiny and beneath it lies a layer of fat (blubber). This is up to 30 cm in thickness and serves to converse heat and body fluids. (Taken from Bahasa Inggris, Materi PTBK Buku 2) Chickens Chickens are bird that cannot fly. they are included into aves group. the have 2 legs and 8 fingers. chickens also has wings, but that cannot fly. There are many different of chicken, those are sizes and colors. generally, the color of chicken are red, black, and whi
