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Just prior to shedding, the skin becomes dull and dry looking and the snake's eyes turn cloudy or blue-coloured. The old layer of skin splits near the mouth and the snake wriggles out, aided by rubbing against rough surfaces. In many cases the cast skin peels backward over the body from head to tail, in one piece like an old sock.
A protest sign referring to reptilian politicians. On September 12, 2003, during the provincial election campaign in Ontario, Canada, the Ernie Eves campaign issued a news release that called opponent Dalton McGuinty an "evil reptilian kitten-eater from another planet". [27] The words appeared at the end of the news release.
Reptiles evolved from amphibious ancestors which left the water and became terrestrial. To prevent loss of moisture, reptilian skin lost the softness and moisture of amphibian skin and developed a thick stratum corneum with multiple layers of lipids, which served as an impermeable barrier, as well as providing protection from ultraviolet light. [5]
Reptiles, from Nouveau Larousse Illustré, 1897–1904, notice the inclusion of amphibians (below the crocodiles). In the 13th century, the category of reptile was recognized in Europe as consisting of a miscellany of egg-laying creatures, including "snakes, various fantastic monsters, lizards, assorted amphibians, and worms", as recorded by Beauvais in his Mirror of Nature. [7]
[1] Cecrops I: the mythical first King of Athens was half man, half snake. Chaac: the Maya civilization rain god, depicted in iconography with a human body showing reptilian or amphibian scales, and with a non-human head evincing fangs and a long, pendulous nose. Dragon Kings: creatures from Chinese mythology sometimes depicted as reptilian ...
Reptilian humanoids, or anthropomorphic reptiles, also called reptiloids, etc., appear in folklore, fiction, and conspiracy theories. In folklore A Nāga couple, featured as a Hoysala relief.
PBr 3 + 3 (CH 3) 2 CHCH 2 OH → 3 (CH 3) 2 CHCH 2 Br + HP(O)(OH) 2. Several detailed procedures are available. [5] [6] In some cases, triphenylphosphine/Br 2 is superior to PBr 3. [7] The mechanism for a primary alcohol involves formation of a phosphorous ester (to form a good leaving group), followed by an S N 2 substitution. Because of the S ...
The hemipenis is the intromittent organ of Squamata, [4] which is the second largest order of vertebrates with over 9,000 species distributed around the world. They differ from the intromittent organs of most other amniotes such as mammals, archosaurs and turtles that have a single genital tubercle, as squamates have the paired genitalia remaining separate. [5]