After blood becomes oxygenated, after blood becomes oxygenated, it does not return to the heart, but goes directly to capillaries that supply the body's cells with oxygen. it returns to the heart, and is then pumped to body cells. it returns to the heart, and is then pumped to the lungs. it does not return to the heart, but goes to the nose and mouth. it does not return to the heart, but goes directly to the lungs.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.