During which phase of meiosis do spindle fibers move the sister chromatids to the center of the cells?

The correct answer would be metaphase II.

Meiosis II is the second division of meiosis in which sister chromatids of chromosomes are separated.

It is also divided into four sub-stages:  

Metaphase II is the stage in which chromosomes are aligned at the central axis to form an imaginary line termed as the metaphase plate.

It is followed by anaphase II in which sister chromatids are separated and moved towards opposite poles.

Thus, the correct answer would be metaphase II.

answer: oof wait

explanation:

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.