Which describes the polarity in a water molecule? O partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms
partial negative charge on the oxygen atom because it pulls electrons from the hydrogen atoms
partial positive charge on the oxygen atom because it pulls electrons from the hydrogen atoms
O partial positive charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms

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.

substitution is the answer in this case

not sure if this is what you'r looking for eubacteria and archaebacteria