Mitosis enables growth and repair via identical cell division in eukaryotes

Steps:

• Define mitosis as eukaryotic nuclear division producing two genetically identical daughter cells for growth, repair, or asexual reproduction.
• Assess option A: Asexual reproduction in eukaryotes (e.g., budding in yeast) uses mitosis to create clones.
• Assess option B: Unicellular organism growth typically involves binary fission, a simpler prokaryotic process without mitotic spindles or phases.
• Eliminate A, C, D as they require mitotic division; select B as the exception.

Why B is correct:

• Binary fission in unicellular prokaryotes divides DNA and cytoplasm directly, bypassing mitosis's eukaryotic mechanisms (e.g., no metaphase alignment per cell cycle laws).

Why the others are wrong:

• A: Asexual reproduction relies on mitosis to generate identical offspring cells in eukaryotes.
• C: Tissue repair uses mitosis to replace cells via somatic division.
• D: Damaged cell replacement involves mitosis to produce new identical cells.

Final answer: B