Identify phase in mitosis shown by: centromeres split and thereby sister chromatids of each chromosome separates and they have pulled apart in the opposite direction.a. Telophaseb. Prophasec. Metaphased. Anaphase

The correct answer is d. Anaphase.
Detailed Explanation:
Mitosis is the process of cell division that results in two genetically identical daughter cells. The process is divided into several stages: prophase, metaphase, anaphase, and telophase. Each phase is marked by specific events that lead to the successful division of the cell.
Anaphase:
• What Happens in Anaphase?
o During anaphase, the centromeres that hold the sister chromatids of each chromosome together split.
o Once the centromeres split, the sister chromatids (which are now considered individual chromosomes) are pulled toward opposite poles of the cell.
o The spindle fibers shorten and facilitate the separation of the chromatids, ensuring that each new daughter cell will receive an identical set of chromosomes.
• Key Events in Anaphase:
o The centromere splits, separating the two sister chromatids of each chromosome.
o The chromatids are pulled in opposite directions toward the centrioles at the opposite poles of the cell.
• Why Not the Other Phases?
o Prophase (b): In prophase, the chromosomes condense and become visible, and the nuclear envelope starts to break down. The centromeres do not split in prophase.
o Metaphase (c): During metaphase, chromosomes align along the metaphase plate (equatorial plane) at the center of the cell, but the centromeres do not split at this stage.
o Telophase (a): In telophase, the separated chromatids (now individual chromosomes) reach the poles of the cell, and a new nuclear envelope forms around each set of chromosomes. The centromeres do not split during telophase.
The phase described in the question, where the centromeres split and the sister chromatids are pulled apart in opposite directions, is anaphase. Therefore, the correct answer is d. Anaphase.