Where does the energy that drives the water cycle come from

Most of the carbon on earth is stored in the form of

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.

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