Answer:
elements have only one atom,while mixtures and compounds are made up of more than one atom,hope this helps
<span>They are composed of similar materials DNA is a deoxyribonucleotide polymer while RNA is a ribonucleotide polymer. A nucleotide is composed of a nitrogenous base, a sugar, and a phosphate group. In ribonucleotides, the sugar is ribose, while in deoxynucleotides, the sugar is deoxyribose. Adenine, guanine, and cytosine are nitrogenous bases in both DNA and RNA, while thymine is found only in DNA and uracil is found only in RNA.</span>
The stem supports the plant and because of the stem the plant is able to grow taller if needed