A particular exosolar system has five planets in total: A, B, C, D, and E. The table lists the orbital periods of these planets in days. Planet Orbital Period (Days) A 600 B 80 C 1,000 D 500 E 100

The structure of a dna molecule is best described as a. one long strand of nucleic acids b. two strands of dna nucleotides joined by hydrogen bonds c. two strands of amino acids joined by hydrogen bonds d. one long strand of amino acids