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.
Where do they live. Snow petrels are nearly entirely restricted to antarctic waters and are associated with pack ice, icebergs and ice floes. Flocks are characteristically seen sitting on icebergs.These beautiful birds forage in the pack ice and breed on the islands and rocky ice-free areas of the Antarctic continent.he all white snow petrel is about the size of a pigeon. They are w hite birds that look like pieces of ice that have come to life. All Petels are graceful flyers and this one is very small. The Snow Petrel is argubly the most beautiful bird on Earth.