Identifying a Star's Life Cycle Place the stages of a high-mass star's life cycle in the correct order, from a star's birth to its death.
supernova
neutron star
nebula
supergiant
protostar

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