Number of species are wingless (fig. [Please select]
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"Hesperornis--a wingless, toothed, diving bird, about 5 feet in length, which inhabited the great seas during the Cretaceous period, some four millions of years ago." [Please select]
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[Illustration: _Hesperornis_ (_Reptilian wingless water-bird_)] These little Theriomorphs, these ancestral mammals, developed hair. [Please select]
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The Apteryx, the wingless bird of New Zealand, belongs to this order. [Please select]
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The workers and soldiers are wingless, and differ solely in the shape and armature of the head. [Please select]
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Both king and queen are wingless, and are of larger size than their subjects. [Please select]
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