Question

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

Explanation:

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

Answer:

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