The diagrams are showing stages of mitosis in a(n) cell. The stage shown in diagram A comes. shown in diagram B. Diagram A is showing spindle microtubules. animal; after; aiding in moving daughter chromosomes to the poles O plant; before; aiding in bringing sister chromatids together so they can join at the centromere animal; after; elongating to bring daughter chromosomes to the poles animal; before; aiding in bringing sister chromatids together so they can join at their kinetochores plant; after; participating in the migration of sister chromatids so they can join at the poles the stage