Question

you look in the microscope and see sister chromatids moving to opposite sides of the cell. you conclude the cell is in
o metaphase
o telophase
o prophase
o anaphase

Explanation:

In anaphase of cell division (mitosis or meiosis), sister chromatids separate and move to opposite poles of the cell. In prophase, chromosomes condense but sister chromatids are still together. In metaphase, chromosomes align at the equator. In telophase, the process of division is nearing completion with new nuclei forming. Since the key event described (sister chromatids moving to opposite sides) is characteristic of anaphase.

Answer:

anaphase