Uric acid then is not present in this case; and the substance must be guanine, an alkaloid known to be the urinary product of the Spiders. [Please select]
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In short, by utilizing, in a different chemical combination, the waste products of animal oxidization, the magnificent Spider rivals the magnificent caterpillar; she beautifies herself with guanine as the other does with its uric acid. [Please select]
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It tells us that the materials rejected by the organism, guanine, uric acid and other dross from life's refinery, play an important part in the coloration of the insect. [Please select]
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