Most of the concentration of which gas results from the activity of producer organisms? carbon dioxide
nitrogen
oxygen
water vapor

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Which statement describe events that occur during interphase?

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