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.
Details... Â© Daniel J. Cox/Natural Exposures. Polar bears live in the circumpolar north in areas where they can hunt their primary prey, ice seals. They are found in Canada (home to roughly 60% of the world's polar bears), the U.S. (Alaska), Greenland, Russia, and Norway (the Svalbard archipelago).