Mitosis enables asexual reproduction in single-celled organisms

Steps:

• Recall mitosis features: 1. DNA replication before division, 2. Equal chromosome distribution to daughter cells, 3. Cytokinesis forming two cells.
• Determine relevance for single-celled organisms: they reproduce asexually via mitosis to create identical offspring.
• Evaluate importance: features 1 and 2 ensure genetic continuity and identical cells essential for survival and propagation.
• Exclude feature 3: cytokinesis is universal but not uniquely critical beyond basic division in single-celled contexts.

Why B is correct:

• Mitosis definition requires DNA replication (1) and chromosome segregation (2) for producing two genetically identical diploid cells, vital for single-celled asexual reproduction.

Why the others are wrong:

• A includes 3, which is not specifically important for single-celled mitosis beyond general cell splitting.
• C omits 2, ignoring equal chromosome distribution needed for genetic fidelity in offspring.
• D excludes 1, overlooking DNA replication essential for duplicating genetic material before division.

Final answer: B