What are the "rungs" of the DNA ladder made of? a. amino acids
b. pairs of nucleotides
c. sugar-phosphate groups
d. ribonucleic acids
e. nucleic acids

Which of the following options describes photosynthesis correctly? question 8 options: a plant uses carbon dioxide and water to make oxygen and nitrogen a plant breaks down sugar to make carbon dioxide. a plant uses sunlight, carbon dioxide, and water to make sugar and oxygen. a plant uses sunlight to break down sugars for digestion into water and oxygen.