Spider are apparently absent. In some species, the exocuticle of the legs and prosoma is modified by a tanning process, resulting in brown coloration. Bilins are found, for example, in "Micrommata virescens", resulting in its green color. Guanine is responsible for the white markings of the European garden spider "Araneus diadematus". It is in many species accumulated in specialized cells called guanocytes. In genera such as "Tetragnatha", "Leucauge", "Argyrodes" or "Theridiosoma", guanine creates their silvery appearance. While guanine is originally an end-product of protein metabolism, its excretion can be blocked in spiders, leading to an increase in its storage. Structural colors
Islamic garden and the idea that the garden represents the antithesis of deterioration. The enclosed garden forms a space that is permanent, a space where time does not decay the elements within the walls, representing an unworldly domain. At the center of the cycle of time is the human being who, after being released, eventually reaches eternity. Aside from gardens typically found in palaces, they also found their way in other locations as well. The Great Mosque of Córdoba contains a continuously planted garden in which rows of fruit trees, similar to an orchard, were planted in the courtyard. This garden was