Question

what is anaphase responsible for? the chromosomes separate and move toward opposite ends of the cell. the nuclear envelope breaks down. the chromatids or chromosomes form into two nuclei. the chromosomes become visible as paired chromatids.

Explanation:

Anaphase is a stage of cell - division where sister chromatids separate and are pulled to opposite poles of the cell by the spindle fibers. The nuclear envelope breakdown occurs in prophase, formation of two nuclei is in telophase, and chromosomes becoming visible as paired chromatids is in prophase.

Answer:

The chromosomes separate and move toward opposite ends of the cell.