Internal and external hydrogen bonds<span> stabilize the </span>DNA<span> molecule. The two strands of</span>DNA<span> stay together by H </span>bonds<span> that occur between complementary nucleotide base pairs. Two </span>hydrogen bonds<span> occur between the adenosine and the thymine base pairs, and between the cytosine and the guanine there are three.</span>
Answer:
Revolutions do share common features, however. One is that they are fast-moving. In a short time, often just a few years, a revolution can bring about significant change and upheaval. Most revolutions are driven by people and groups inspired by hope, idealism and dreams of a better society.
Compare: They are both living organisms.
contrast: Autotrophs make their own food. But heterotrophs can not make their own food.
Your diet has to supply 9 of the amino acids and your body can manufacture the rest