DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are polymers of nucleotides linked in a chain through phosphodiester bonds. In biological systems, they serve as information-carrying molecules or, in the case of some RNA molecules, catalysts.NA (deoxyribonucleic acid) and RNA (ribonucleic acid) are polymers of nucleotides linked in a chain through phosphodiester bonds. In biological systems, they serve as information-carrying molecules or, in the case of some RNA molecules, catalysts.
snow petrels live in Antarctica, they are pure white small birds with a pointy beack.now Petrels stay warm because they have especially thick feathers and if they are freezing cold the will fluff up their feathers to stop the heat from escaping.
Petrels normally live in deep rock crevasses or in rocky cliffs.heir webbed feet help them swim, and are also used, especially by the storm petrels, to patter upon the ocean surface in search of floating bits of food. The strong bill has a food-grabbing hook on the end, and the typical dark, or dark-and-light plumage helps them blend into a monochromatic landscape.