Mitosis drives cell division for organismal growth and repair

Steps:

• Recall mitosis as the process of nuclear division producing two identical daughter cells.
• Identify primary functions: growth, tissue repair, and asexual reproduction.
• Evaluate choices against these functions to find the best match.
• Confirm A aligns directly with a core role.

Why A is correct:

• Mitosis produces identical cells that increase cell number, enabling organismal growth as defined in cell biology.

Why the others are wrong:

• B: Mitosis creates genetically identical cells, not different ones (that's meiosis).
• C: Repair involves mitosis but is secondary to growth; question asks for a role, but A is more fundamental.
• D: Mitosis replaces normal tissue, not specifically cancerous; cancer involves uncontrolled mitosis.

Final answer: A