Astudy was done to see whether a smaller dose of flu vaccine could be used successfully. in this study, the usual amount of vaccine was injected into half the patients, and the other half of the patients had only a small amount of vaccine injected. the response was measured by looking at the production of antibodies. in the end, the lower dose of vaccine was just as effective as a higher dose for those under 65 years old. what more do we need to know to be able to conclude that the lower dose of vaccine was equally effective at preventing the flu for those under 65?

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.