Summary. Base pairs<span> occur when </span>nitrogenous bases<span>make hydrogen bonds with each other. Each </span>base<span> has a specific partner: guanine with </span>cytosine<span>, </span>adenine<span> with thymine (in </span>DNA<span>) or </span>adenine<span> with uracil (in RNA). The hydrogen bonds are weak, allowing </span>DNA<span> to 'unzip'.</span>
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the repeating rifle, submarine, railroad, telegraph/morse code, ironclad, battlefield medicine, minie ball ammunition
Um, a family is composed of people?
The layer of granitic, sedimentary and metamorphic rocks which form the continents and the areas of shallow seabed close to their shores, known as continental shelves.
