Question

which phase does the image best represent? interphase: the cell grows and replicates its dna. prophase: the nucleus disintegrates and the dna condenses into chromosome; the centrioles migrate to opposite ends of the cell. anaphase: the spindle fibers retract, pulling the chromosomes apart. telophase: the chromosomes loosen back into dna; the nuclear membrane reforms; the cleavage furrow/cell plates form. cytokinesis: the cytoplasm divides and there are now two identical daughter cells. metaphase: the chromosomes line up in the middle of the cell; the spindle fibers attach to their centromeres.

Explanation:

To determine the phase, we analyze each option:

• Interphase: No visible chromosomes moving, so incorrect.
• Prophase: Chromosomes condense, but in the image, chromosomes are being pulled apart, not just condensing. Incorrect.
• Anaphase: Spindle fibers retract, pulling sister chromatids (chromosomes) apart to opposite poles. The image shows chromosomes moving towards opposite ends, matching Anaphase.
• Telophase: Chromosomes loosen, nuclear membrane reforms – not seen here. Incorrect.
• Cytokinesis: Cytoplasm divides, forming two cells – not shown. Incorrect.
• Metaphase: Chromosomes line up in the middle – not the case here. Incorrect.

Answer:

Anaphase: The spindle fibers retract, pulling the chromosomes apart.