Which statement best describes what is happening in the cell above?
the cell is in metaphase because the chromosomes have replicated.
the cell is in anaphase because the sister chromatids have separated.
the cell is in telophase because the chromosomes are still paired.
the cell is in prophase because the sister chromatids have condensed.

The cell is in anaphase because the sister chromatids have separated.

Explanation:

During anaphase, the sister chromatids are separated from telomere and move to the opposite poles so that the final step of division can take place (telophase). The separation of chromatids takes place because the responsible binding protein breaks and allows the separation. The split of chromatids is equal for both ends otherwise it leads to genetic disorders due to unequal distribution of genetic material in dividing cells. This step is also known as spindle checkpoint.

d is the answer

sorry if its wrong!

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.