DNA is a double helix, meaning there are two strands.
<span>DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group and one of four types of nitrogen bases. To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating.</span>
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bacteria, archaea, fungi (yeasts and molds), algae, protozoa, and viruses—are summarized below. Links to the more detailed articles on each of the major groups are provided. Bacteria (eubacteria and archaea)
Explanation:
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Answer: A and C, I used Socratic
Answer:
They release oxygen so we can breathe
